21057890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1$

素因数の和:327

約数の個数: 64

約数和(自身を含む): 46448640

約数和(自身を除く): 25390750

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 38, 70, 71, 95, 133, 142, 190, 223, 266, 355, 446, 497, 665, 710, 994, 1115, 1330, 1349, 1561, 2230, 2485, 2698, 3122, 4237, 4970, 6745, 7805, 8474, 9443, 13490, 15610, 15833, 18886, 21185, 29659, 31666, 42370, 47215, 59318, 79165, 94430, 110831, 148295, 158330, 221662, 296590, 300827, 554155, 601654, 1108310, 1504135, 2105789, 3008270, 4211578, 10528945, 21057890]

約数ペア:

[(1, 21057890), (2, 10528945), (5, 4211578), (7, 3008270), (10, 2105789), (14, 1504135), (19, 1108310), (35, 601654), (38, 554155), (70, 300827), (71, 296590), (95, 221662), (133, 158330), (142, 148295), (190, 110831), (223, 94430), (266, 79165), (355, 59318), (446, 47215), (497, 42370), (665, 31666), (710, 29659), (994, 21185), (1115, 18886), (1330, 15833), (1349, 15610), (1561, 13490), (2230, 9443), (2485, 8474), (2698, 7805), (3122, 6745), (4237, 4970)]