21386560

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1$

素因数の和:180

約数の個数: 112

約数和(自身を含む): 56455056

約数和(自身を除く): 35068496

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 53, 64, 65, 80, 97, 104, 106, 130, 160, 194, 208, 212, 260, 265, 320, 388, 416, 424, 485, 520, 530, 689, 776, 832, 848, 970, 1040, 1060, 1261, 1378, 1552, 1696, 1940, 2080, 2120, 2522, 2756, 3104, 3392, 3445, 3880, 4160, 4240, 5044, 5141, 5512, 6208, 6305, 6890, 7760, 8480, 10088, 10282, 11024, 12610, 13780, 15520, 16960, 20176, 20564, 22048, 25220, 25705, 27560, 31040, 40352, 41128, 44096, 50440, 51410, 55120, 66833, 80704, 82256, 100880, 102820, 110240, 133666, 164512, 201760, 205640, 220480, 267332, 329024, 334165, 403520, 411280, 534664, 668330, 822560, 1069328, 1336660, 1645120, 2138656, 2673320, 4277312, 5346640, 10693280, 21386560]

約数ペア:

[(1, 21386560), (2, 10693280), (4, 5346640), (5, 4277312), (8, 2673320), (10, 2138656), (13, 1645120), (16, 1336660), (20, 1069328), (26, 822560), (32, 668330), (40, 534664), (52, 411280), (53, 403520), (64, 334165), (65, 329024), (80, 267332), (97, 220480), (104, 205640), (106, 201760), (130, 164512), (160, 133666), (194, 110240), (208, 102820), (212, 100880), (260, 82256), (265, 80704), (320, 66833), (388, 55120), (416, 51410), (424, 50440), (485, 44096), (520, 41128), (530, 40352), (689, 31040), (776, 27560), (832, 25705), (848, 25220), (970, 22048), (1040, 20564), (1060, 20176), (1261, 16960), (1378, 15520), (1552, 13780), (1696, 12610), (1940, 11024), (2080, 10282), (2120, 10088), (2522, 8480), (2756, 7760), (3104, 6890), (3392, 6305), (3445, 6208), (3880, 5512), (4160, 5141), (4240, 5044)]