128580400

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{313}}^1$

素因数の和:423

約数の個数: 120

約数和(自身を含む): 337964480

約数和(自身を除く): 209384080

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 79, 80, 100, 104, 130, 158, 200, 208, 260, 313, 316, 325, 395, 400, 520, 626, 632, 650, 790, 1027, 1040, 1252, 1264, 1300, 1565, 1580, 1975, 2054, 2504, 2600, 3130, 3160, 3950, 4069, 4108, 5008, 5135, 5200, 6260, 6320, 7825, 7900, 8138, 8216, 10270, 12520, 15650, 15800, 16276, 16432, 20345, 20540, 24727, 25040, 25675, 31300, 31600, 32552, 40690, 41080, 49454, 51350, 62600, 65104, 81380, 82160, 98908, 101725, 102700, 123635, 125200, 162760, 197816, 203450, 205400, 247270, 321451, 325520, 395632, 406900, 410800, 494540, 618175, 642902, 813800, 989080, 1236350, 1285804, 1607255, 1627600, 1978160, 2472700, 2571608, 3214510, 4945400, 5143216, 6429020, 8036275, 9890800, 12858040, 16072550, 25716080, 32145100, 64290200, 128580400]

約数ペア:

[(1, 128580400), (2, 64290200), (4, 32145100), (5, 25716080), (8, 16072550), (10, 12858040), (13, 9890800), (16, 8036275), (20, 6429020), (25, 5143216), (26, 4945400), (40, 3214510), (50, 2571608), (52, 2472700), (65, 1978160), (79, 1627600), (80, 1607255), (100, 1285804), (104, 1236350), (130, 989080), (158, 813800), (200, 642902), (208, 618175), (260, 494540), (313, 410800), (316, 406900), (325, 395632), (395, 325520), (400, 321451), (520, 247270), (626, 205400), (632, 203450), (650, 197816), (790, 162760), (1027, 125200), (1040, 123635), (1252, 102700), (1264, 101725), (1300, 98908), (1565, 82160), (1580, 81380), (1975, 65104), (2054, 62600), (2504, 51350), (2600, 49454), (3130, 41080), (3160, 40690), (3950, 32552), (4069, 31600), (4108, 31300), (5008, 25675), (5135, 25040), (5200, 24727), (6260, 20540), (6320, 20345), (7825, 16432), (7900, 16276), (8138, 15800), (8216, 15650), (10270, 12520)]