21981015

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2251}}^1$

素因数の和:2300

約数の個数: 48

約数和(自身を含む): 44967936

約数和(自身を除く): 22986921

約数列:

[1, 3, 5, 7, 9, 15, 21, 31, 35, 45, 63, 93, 105, 155, 217, 279, 315, 465, 651, 1085, 1395, 1953, 2251, 3255, 6753, 9765, 11255, 15757, 20259, 33765, 47271, 69781, 78785, 101295, 141813, 209343, 236355, 348905, 488467, 628029, 709065, 1046715, 1465401, 2442335, 3140145, 4396203, 7327005, 21981015]

約数ペア:

[(1, 21981015), (3, 7327005), (5, 4396203), (7, 3140145), (9, 2442335), (15, 1465401), (21, 1046715), (31, 709065), (35, 628029), (45, 488467), (63, 348905), (93, 236355), (105, 209343), (155, 141813), (217, 101295), (279, 78785), (315, 69781), (465, 47271), (651, 33765), (1085, 20259), (1395, 15757), (1953, 11255), (2251, 9765), (3255, 6753)]