21729910

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{73}}^1\times {\mathrm{103}}^1$

素因数の和:217

約数の個数: 48

約数和(自身を含む): 42528096

約数和(自身を除く): 20798186

約数列:

[1, 2, 5, 10, 17, 34, 73, 85, 103, 146, 170, 206, 289, 365, 515, 578, 730, 1030, 1241, 1445, 1751, 2482, 2890, 3502, 6205, 7519, 8755, 12410, 15038, 17510, 21097, 29767, 37595, 42194, 59534, 75190, 105485, 127823, 148835, 210970, 255646, 297670, 639115, 1278230, 2172991, 4345982, 10864955, 21729910]

約数ペア:

[(1, 21729910), (2, 10864955), (5, 4345982), (10, 2172991), (17, 1278230), (34, 639115), (73, 297670), (85, 255646), (103, 210970), (146, 148835), (170, 127823), (206, 105485), (289, 75190), (365, 59534), (515, 42194), (578, 37595), (730, 29767), (1030, 21097), (1241, 17510), (1445, 15038), (1751, 12410), (2482, 8755), (2890, 7519), (3502, 6205)]