21930640

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{239}}^1$

素因数の和:320

約数の個数: 80

約数和(自身を含む): 54282240

約数和(自身を除く): 32351600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 37, 40, 62, 74, 80, 124, 148, 155, 185, 239, 248, 296, 310, 370, 478, 496, 592, 620, 740, 956, 1147, 1195, 1240, 1480, 1912, 2294, 2390, 2480, 2960, 3824, 4588, 4780, 5735, 7409, 8843, 9176, 9560, 11470, 14818, 17686, 18352, 19120, 22940, 29636, 35372, 37045, 44215, 45880, 59272, 70744, 74090, 88430, 91760, 118544, 141488, 148180, 176860, 274133, 296360, 353720, 548266, 592720, 707440, 1096532, 1370665, 2193064, 2741330, 4386128, 5482660, 10965320, 21930640]

約数ペア:

[(1, 21930640), (2, 10965320), (4, 5482660), (5, 4386128), (8, 2741330), (10, 2193064), (16, 1370665), (20, 1096532), (31, 707440), (37, 592720), (40, 548266), (62, 353720), (74, 296360), (80, 274133), (124, 176860), (148, 148180), (155, 141488), (185, 118544), (239, 91760), (248, 88430), (296, 74090), (310, 70744), (370, 59272), (478, 45880), (496, 44215), (592, 37045), (620, 35372), (740, 29636), (956, 22940), (1147, 19120), (1195, 18352), (1240, 17686), (1480, 14818), (1912, 11470), (2294, 9560), (2390, 9176), (2480, 8843), (2960, 7409), (3824, 5735), (4588, 4780)]