21096728

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{2543}}^1$

素因数の和:2627

約数の個数: 32

約数和(自身を含む): 42586560

約数和(自身を除く): 21489832

約数列:

[1, 2, 4, 8, 17, 34, 61, 68, 122, 136, 244, 488, 1037, 2074, 2543, 4148, 5086, 8296, 10172, 20344, 43231, 86462, 155123, 172924, 310246, 345848, 620492, 1240984, 2637091, 5274182, 10548364, 21096728]

約数ペア:

[(1, 21096728), (2, 10548364), (4, 5274182), (8, 2637091), (17, 1240984), (34, 620492), (61, 345848), (68, 310246), (122, 172924), (136, 155123), (244, 86462), (488, 43231), (1037, 20344), (2074, 10172), (2543, 8296), (4148, 5086)]