20145539440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{81049}}^1$

素因数の和:81314

約数の個数: 80

約数和(自身を含む): 50653008000

約数和(自身を除く): 30507468560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 239, 260, 478, 520, 956, 1040, 1195, 1912, 2390, 3107, 3824, 4780, 6214, 9560, 12428, 15535, 19120, 24856, 31070, 49712, 62140, 81049, 124280, 162098, 248560, 324196, 405245, 648392, 810490, 1053637, 1296784, 1620980, 2107274, 3241960, 4214548, 5268185, 6483920, 8429096, 10536370, 16858192, 19370711, 21072740, 38741422, 42145480, 77482844, 84290960, 96853555, 154965688, 193707110, 251819243, 309931376, 387414220, 503638486, 774828440, 1007276972, 1259096215, 1549656880, 2014553944, 2518192430, 4029107888, 5036384860, 10072769720, 20145539440]

約数ペア:

[(1, 20145539440), (2, 10072769720), (4, 5036384860), (5, 4029107888), (8, 2518192430), (10, 2014553944), (13, 1549656880), (16, 1259096215), (20, 1007276972), (26, 774828440), (40, 503638486), (52, 387414220), (65, 309931376), (80, 251819243), (104, 193707110), (130, 154965688), (208, 96853555), (239, 84290960), (260, 77482844), (478, 42145480), (520, 38741422), (956, 21072740), (1040, 19370711), (1195, 16858192), (1912, 10536370), (2390, 8429096), (3107, 6483920), (3824, 5268185), (4780, 4214548), (6214, 3241960), (9560, 2107274), (12428, 1620980), (15535, 1296784), (19120, 1053637), (24856, 810490), (31070, 648392), (49712, 405245), (62140, 324196), (81049, 248560), (124280, 162098)]