21756885

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{659}}^1$

素因数の和:769

約数の個数: 32

約数和(自身を含む): 36495360

約数和(自身を除く): 14738475

約数列:

[1, 3, 5, 15, 31, 71, 93, 155, 213, 355, 465, 659, 1065, 1977, 2201, 3295, 6603, 9885, 11005, 20429, 33015, 46789, 61287, 102145, 140367, 233945, 306435, 701835, 1450459, 4351377, 7252295, 21756885]

約数ペア:

[(1, 21756885), (3, 7252295), (5, 4351377), (15, 1450459), (31, 701835), (71, 306435), (93, 233945), (155, 140367), (213, 102145), (355, 61287), (465, 46789), (659, 33015), (1065, 20429), (1977, 11005), (2201, 9885), (3295, 6603)]