21291970

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{2287}}^1$

素因数の和:2327

約数の個数: 48

約数和(自身を含む): 46949760

約数和(自身を除く): 25657790

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 38, 49, 70, 95, 98, 133, 190, 245, 266, 490, 665, 931, 1330, 1862, 2287, 4574, 4655, 9310, 11435, 16009, 22870, 32018, 43453, 80045, 86906, 112063, 160090, 217265, 224126, 304171, 434530, 560315, 608342, 1120630, 1520855, 2129197, 3041710, 4258394, 10645985, 21291970]

約数ペア:

[(1, 21291970), (2, 10645985), (5, 4258394), (7, 3041710), (10, 2129197), (14, 1520855), (19, 1120630), (35, 608342), (38, 560315), (49, 434530), (70, 304171), (95, 224126), (98, 217265), (133, 160090), (190, 112063), (245, 86906), (266, 80045), (490, 43453), (665, 32018), (931, 22870), (1330, 16009), (1862, 11435), (2287, 9310), (4574, 4655)]