28478320

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{197}}^1$

素因数の和:362

約数の個数: 80

約数和(自身を含む): 72182880

約数和(自身を除く): 43704560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 139, 197, 208, 260, 278, 394, 520, 556, 695, 788, 985, 1040, 1112, 1390, 1576, 1807, 1970, 2224, 2561, 2780, 3152, 3614, 3940, 5122, 5560, 7228, 7880, 9035, 10244, 11120, 12805, 14456, 15760, 18070, 20488, 25610, 27383, 28912, 36140, 40976, 51220, 54766, 72280, 102440, 109532, 136915, 144560, 204880, 219064, 273830, 355979, 438128, 547660, 711958, 1095320, 1423916, 1779895, 2190640, 2847832, 3559790, 5695664, 7119580, 14239160, 28478320]

約数ペア:

[(1, 28478320), (2, 14239160), (4, 7119580), (5, 5695664), (8, 3559790), (10, 2847832), (13, 2190640), (16, 1779895), (20, 1423916), (26, 1095320), (40, 711958), (52, 547660), (65, 438128), (80, 355979), (104, 273830), (130, 219064), (139, 204880), (197, 144560), (208, 136915), (260, 109532), (278, 102440), (394, 72280), (520, 54766), (556, 51220), (695, 40976), (788, 36140), (985, 28912), (1040, 27383), (1112, 25610), (1390, 20488), (1576, 18070), (1807, 15760), (1970, 14456), (2224, 12805), (2561, 11120), (2780, 10244), (3152, 9035), (3614, 7880), (3940, 7228), (5122, 5560)]