20785987593

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{503}}^1$

素因数の和:656

約数の個数: 144

約数和(自身を含む): 38343352320

約数和(自身を除く): 17557364727

約数列:

[1, 3, 7, 9, 19, 21, 23, 57, 63, 69, 79, 133, 161, 171, 207, 237, 361, 399, 437, 483, 503, 553, 711, 1083, 1197, 1311, 1449, 1501, 1509, 1659, 1817, 2527, 3059, 3249, 3521, 3933, 4503, 4527, 4977, 5451, 7581, 8303, 9177, 9557, 10507, 10563, 11569, 12719, 13509, 16353, 22743, 24909, 27531, 28519, 28671, 31521, 31689, 34523, 34707, 38157, 39737, 58121, 66899, 74727, 80983, 85557, 86013, 94563, 103569, 104121, 114471, 119211, 174363, 181583, 199633, 200697, 219811, 241661, 242949, 256671, 278159, 310707, 357633, 523089, 544749, 598899, 602091, 655937, 659433, 724983, 728847, 755003, 834477, 913951, 1271081, 1538677, 1634247, 1796697, 1967811, 1978299, 2174949, 2265009, 2503431, 2741853, 3813243, 4176409, 4591559, 4616031, 5285021, 5903433, 6397657, 6795027, 8225559, 11439729, 12529227, 13774677, 13848093, 14345057, 15855063, 17365069, 19192971, 29234863, 37587681, 41324031, 43035171, 47565189, 52095207, 57578913, 87704589, 100415399, 121555483, 129105513, 156285621, 263113767, 301246197, 329936311, 364666449, 903738591, 989808933, 1093999347, 2309554177, 2969426799, 6928662531, 20785987593]

約数ペア:

[(1, 20785987593), (3, 6928662531), (7, 2969426799), (9, 2309554177), (19, 1093999347), (21, 989808933), (23, 903738591), (57, 364666449), (63, 329936311), (69, 301246197), (79, 263113767), (133, 156285621), (161, 129105513), (171, 121555483), (207, 100415399), (237, 87704589), (361, 57578913), (399, 52095207), (437, 47565189), (483, 43035171), (503, 41324031), (553, 37587681), (711, 29234863), (1083, 19192971), (1197, 17365069), (1311, 15855063), (1449, 14345057), (1501, 13848093), (1509, 13774677), (1659, 12529227), (1817, 11439729), (2527, 8225559), (3059, 6795027), (3249, 6397657), (3521, 5903433), (3933, 5285021), (4503, 4616031), (4527, 4591559), (4977, 4176409), (5451, 3813243), (7581, 2741853), (8303, 2503431), (9177, 2265009), (9557, 2174949), (10507, 1978299), (10563, 1967811), (11569, 1796697), (12719, 1634247), (13509, 1538677), (16353, 1271081), (22743, 913951), (24909, 834477), (27531, 755003), (28519, 728847), (28671, 724983), (31521, 659433), (31689, 655937), (34523, 602091), (34707, 598899), (38157, 544749), (39737, 523089), (58121, 357633), (66899, 310707), (74727, 278159), (80983, 256671), (85557, 242949), (86013, 241661), (94563, 219811), (103569, 200697), (104121, 199633), (114471, 181583), (119211, 174363)]