21230505

素因数分解:

$3^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1$

素因数の和:156

約数の個数: 80

約数和(自身を含む): 41817600

約数和(自身を除く): 20587095

約数列:

[1, 3, 5, 9, 15, 19, 27, 31, 45, 57, 81, 89, 93, 95, 135, 155, 171, 267, 279, 285, 405, 445, 465, 513, 589, 801, 837, 855, 1335, 1395, 1539, 1691, 1767, 2403, 2511, 2565, 2759, 2945, 4005, 4185, 5073, 5301, 7209, 7695, 8277, 8455, 8835, 12015, 12555, 13795, 15219, 15903, 24831, 25365, 26505, 36045, 41385, 45657, 47709, 52421, 74493, 76095, 79515, 124155, 136971, 157263, 223479, 228285, 238545, 262105, 372465, 471789, 684855, 786315, 1117395, 1415367, 2358945, 4246101, 7076835, 21230505]

約数ペア:

[(1, 21230505), (3, 7076835), (5, 4246101), (9, 2358945), (15, 1415367), (19, 1117395), (27, 786315), (31, 684855), (45, 471789), (57, 372465), (81, 262105), (89, 238545), (93, 228285), (95, 223479), (135, 157263), (155, 136971), (171, 124155), (267, 79515), (279, 76095), (285, 74493), (405, 52421), (445, 47709), (465, 45657), (513, 41385), (589, 36045), (801, 26505), (837, 25365), (855, 24831), (1335, 15903), (1395, 15219), (1539, 13795), (1691, 12555), (1767, 12015), (2403, 8835), (2511, 8455), (2565, 8277), (2759, 7695), (2945, 7209), (4005, 5301), (4185, 5073)]