8400080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1$

素因数の和:264

約数の個数: 80

約数和(自身を含む): 21654864

約数和(自身を除く): 13254784

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 41, 52, 65, 80, 82, 104, 130, 164, 197, 205, 208, 260, 328, 394, 410, 520, 533, 656, 788, 820, 985, 1040, 1066, 1576, 1640, 1970, 2132, 2561, 2665, 3152, 3280, 3940, 4264, 5122, 5330, 7880, 8077, 8528, 10244, 10660, 12805, 15760, 16154, 20488, 21320, 25610, 32308, 40385, 40976, 42640, 51220, 64616, 80770, 102440, 105001, 129232, 161540, 204880, 210002, 323080, 420004, 525005, 646160, 840008, 1050010, 1680016, 2100020, 4200040, 8400080]

約数ペア:

[(1, 8400080), (2, 4200040), (4, 2100020), (5, 1680016), (8, 1050010), (10, 840008), (13, 646160), (16, 525005), (20, 420004), (26, 323080), (40, 210002), (41, 204880), (52, 161540), (65, 129232), (80, 105001), (82, 102440), (104, 80770), (130, 64616), (164, 51220), (197, 42640), (205, 40976), (208, 40385), (260, 32308), (328, 25610), (394, 21320), (410, 20488), (520, 16154), (533, 15760), (656, 12805), (788, 10660), (820, 10244), (985, 8528), (1040, 8077), (1066, 7880), (1576, 5330), (1640, 5122), (1970, 4264), (2132, 3940), (2561, 3280), (2665, 3152)]