217443920

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{87679}}^1$

素因数の和:87723

約数の個数: 40

約数和(自身を含む): 521871360

約数和(自身を除く): 304427440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 87679, 175358, 350716, 438395, 701432, 876790, 1402864, 1753580, 2718049, 3507160, 5436098, 7014320, 10872196, 13590245, 21744392, 27180490, 43488784, 54360980, 108721960, 217443920]

約数ペア:

[(1, 217443920), (2, 108721960), (4, 54360980), (5, 43488784), (8, 27180490), (10, 21744392), (16, 13590245), (20, 10872196), (31, 7014320), (40, 5436098), (62, 3507160), (80, 2718049), (124, 1753580), (155, 1402864), (248, 876790), (310, 701432), (496, 438395), (620, 350716), (1240, 175358), (2480, 87679)]