21103940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1$

素因数の和:237

約数の個数: 96

約数和(自身を含む): 53512704

約数和(自身を除く): 32408764

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 47, 52, 55, 65, 94, 110, 130, 143, 157, 188, 220, 235, 260, 286, 314, 470, 517, 572, 611, 628, 715, 785, 940, 1034, 1222, 1430, 1570, 1727, 2041, 2068, 2444, 2585, 2860, 3055, 3140, 3454, 4082, 5170, 6110, 6721, 6908, 7379, 8164, 8635, 10205, 10340, 12220, 13442, 14758, 17270, 20410, 22451, 26884, 29516, 33605, 34540, 36895, 40820, 44902, 67210, 73790, 81169, 89804, 95927, 112255, 134420, 147580, 162338, 191854, 224510, 324676, 383708, 405845, 449020, 479635, 811690, 959270, 1055197, 1623380, 1918540, 2110394, 4220788, 5275985, 10551970, 21103940]

約数ペア:

[(1, 21103940), (2, 10551970), (4, 5275985), (5, 4220788), (10, 2110394), (11, 1918540), (13, 1623380), (20, 1055197), (22, 959270), (26, 811690), (44, 479635), (47, 449020), (52, 405845), (55, 383708), (65, 324676), (94, 224510), (110, 191854), (130, 162338), (143, 147580), (157, 134420), (188, 112255), (220, 95927), (235, 89804), (260, 81169), (286, 73790), (314, 67210), (470, 44902), (517, 40820), (572, 36895), (611, 34540), (628, 33605), (715, 29516), (785, 26884), (940, 22451), (1034, 20410), (1222, 17270), (1430, 14758), (1570, 13442), (1727, 12220), (2041, 10340), (2068, 10205), (2444, 8635), (2585, 8164), (2860, 7379), (3055, 6908), (3140, 6721), (3454, 6110), (4082, 5170)]