20293520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{79}}^1$

素因数の和:137

約数の個数: 120

約数和(自身を含む): 54460800

約数和(自身を除く): 34167280

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 38, 40, 52, 65, 76, 79, 80, 95, 104, 130, 152, 158, 169, 190, 208, 247, 260, 304, 316, 338, 380, 395, 494, 520, 632, 676, 760, 790, 845, 988, 1027, 1040, 1235, 1264, 1352, 1501, 1520, 1580, 1690, 1976, 2054, 2470, 2704, 3002, 3160, 3211, 3380, 3952, 4108, 4940, 5135, 6004, 6320, 6422, 6760, 7505, 8216, 9880, 10270, 12008, 12844, 13351, 13520, 15010, 16055, 16432, 19513, 19760, 20540, 24016, 25688, 26702, 30020, 32110, 39026, 41080, 51376, 53404, 60040, 64220, 66755, 78052, 82160, 97565, 106808, 120080, 128440, 133510, 156104, 195130, 213616, 253669, 256880, 267020, 312208, 390260, 507338, 534040, 780520, 1014676, 1068080, 1268345, 1561040, 2029352, 2536690, 4058704, 5073380, 10146760, 20293520]

約数ペア:

[(1, 20293520), (2, 10146760), (4, 5073380), (5, 4058704), (8, 2536690), (10, 2029352), (13, 1561040), (16, 1268345), (19, 1068080), (20, 1014676), (26, 780520), (38, 534040), (40, 507338), (52, 390260), (65, 312208), (76, 267020), (79, 256880), (80, 253669), (95, 213616), (104, 195130), (130, 156104), (152, 133510), (158, 128440), (169, 120080), (190, 106808), (208, 97565), (247, 82160), (260, 78052), (304, 66755), (316, 64220), (338, 60040), (380, 53404), (395, 51376), (494, 41080), (520, 39026), (632, 32110), (676, 30020), (760, 26702), (790, 25688), (845, 24016), (988, 20540), (1027, 19760), (1040, 19513), (1235, 16432), (1264, 16055), (1352, 15010), (1501, 13520), (1520, 13351), (1580, 12844), (1690, 12008), (1976, 10270), (2054, 9880), (2470, 8216), (2704, 7505), (3002, 6760), (3160, 6422), (3211, 6320), (3380, 6004), (3952, 5135), (4108, 4940)]