21871655

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{283}}^1$

素因数の和:371

約数の個数: 32

約数和(自身を含む): 30058560

約数和(自身を除く): 8186905

約数列:

[1, 5, 13, 29, 41, 65, 145, 205, 283, 377, 533, 1189, 1415, 1885, 2665, 3679, 5945, 8207, 11603, 15457, 18395, 41035, 58015, 77285, 106691, 150839, 336487, 533455, 754195, 1682435, 4374331, 21871655]

約数ペア:

[(1, 21871655), (5, 4374331), (13, 1682435), (29, 754195), (41, 533455), (65, 336487), (145, 150839), (205, 106691), (283, 77285), (377, 58015), (533, 41035), (1189, 18395), (1415, 15457), (1885, 11603), (2665, 8207), (3679, 5945)]