21546880

素因数分解:

$2^7\times 5^1\times {\mathrm{131}}^1\times {\mathrm{257}}^1$

素因数の和:407

約数の個数: 64

約数和(自身を含む): 52105680

約数和(自身を除く): 30558800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 131, 160, 257, 262, 320, 514, 524, 640, 655, 1028, 1048, 1285, 1310, 2056, 2096, 2570, 2620, 4112, 4192, 5140, 5240, 8224, 8384, 10280, 10480, 16448, 16768, 20560, 20960, 32896, 33667, 41120, 41920, 67334, 82240, 83840, 134668, 164480, 168335, 269336, 336670, 538672, 673340, 1077344, 1346680, 2154688, 2693360, 4309376, 5386720, 10773440, 21546880]

約数ペア:

[(1, 21546880), (2, 10773440), (4, 5386720), (5, 4309376), (8, 2693360), (10, 2154688), (16, 1346680), (20, 1077344), (32, 673340), (40, 538672), (64, 336670), (80, 269336), (128, 168335), (131, 164480), (160, 134668), (257, 83840), (262, 82240), (320, 67334), (514, 41920), (524, 41120), (640, 33667), (655, 32896), (1028, 20960), (1048, 20560), (1285, 16768), (1310, 16448), (2056, 10480), (2096, 10280), (2570, 8384), (2620, 8224), (4112, 5240), (4192, 5140)]