21385600

素因数分解:

$2^7\times 5^2\times {\mathrm{41}}^1\times {\mathrm{163}}^1$

素因数の和:228

約数の個数: 96

約数和(自身を含む): 54449640

約数和(自身を除く): 33064040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 41, 50, 64, 80, 82, 100, 128, 160, 163, 164, 200, 205, 320, 326, 328, 400, 410, 640, 652, 656, 800, 815, 820, 1025, 1304, 1312, 1600, 1630, 1640, 2050, 2608, 2624, 3200, 3260, 3280, 4075, 4100, 5216, 5248, 6520, 6560, 6683, 8150, 8200, 10432, 13040, 13120, 13366, 16300, 16400, 20864, 26080, 26240, 26732, 32600, 32800, 33415, 52160, 53464, 65200, 65600, 66830, 104320, 106928, 130400, 131200, 133660, 167075, 213856, 260800, 267320, 334150, 427712, 521600, 534640, 668300, 855424, 1069280, 1336600, 2138560, 2673200, 4277120, 5346400, 10692800, 21385600]

約数ペア:

[(1, 21385600), (2, 10692800), (4, 5346400), (5, 4277120), (8, 2673200), (10, 2138560), (16, 1336600), (20, 1069280), (25, 855424), (32, 668300), (40, 534640), (41, 521600), (50, 427712), (64, 334150), (80, 267320), (82, 260800), (100, 213856), (128, 167075), (160, 133660), (163, 131200), (164, 130400), (200, 106928), (205, 104320), (320, 66830), (326, 65600), (328, 65200), (400, 53464), (410, 52160), (640, 33415), (652, 32800), (656, 32600), (800, 26732), (815, 26240), (820, 26080), (1025, 20864), (1304, 16400), (1312, 16300), (1600, 13366), (1630, 13120), (1640, 13040), (2050, 10432), (2608, 8200), (2624, 8150), (3200, 6683), (3260, 6560), (3280, 6520), (4075, 5248), (4100, 5216)]