21552880

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6571}}^1$

素因数の和:6625

約数の個数: 40

約数和(自身を含む): 51340464

約数和(自身を除く): 29787584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6571, 13142, 26284, 32855, 52568, 65710, 105136, 131420, 262840, 269411, 525680, 538822, 1077644, 1347055, 2155288, 2694110, 4310576, 5388220, 10776440, 21552880]

約数ペア:

[(1, 21552880), (2, 10776440), (4, 5388220), (5, 4310576), (8, 2694110), (10, 2155288), (16, 1347055), (20, 1077644), (40, 538822), (41, 525680), (80, 269411), (82, 262840), (164, 131420), (205, 105136), (328, 65710), (410, 52568), (656, 32855), (820, 26284), (1640, 13142), (3280, 6571)]