21315580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{257}}^1$

素因数の和:319

約数の個数: 96

約数和(自身を含む): 54613440

約数和(自身を除く): 33297860

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 29, 44, 52, 55, 58, 65, 110, 116, 130, 143, 145, 220, 257, 260, 286, 290, 319, 377, 514, 572, 580, 638, 715, 754, 1028, 1276, 1285, 1430, 1508, 1595, 1885, 2570, 2827, 2860, 3190, 3341, 3770, 4147, 5140, 5654, 6380, 6682, 7453, 7540, 8294, 11308, 13364, 14135, 14906, 16588, 16705, 20735, 28270, 29812, 33410, 36751, 37265, 41470, 56540, 66820, 73502, 74530, 81983, 82940, 96889, 147004, 149060, 163966, 183755, 193778, 327932, 367510, 387556, 409915, 484445, 735020, 819830, 968890, 1065779, 1639660, 1937780, 2131558, 4263116, 5328895, 10657790, 21315580]

約数ペア:

[(1, 21315580), (2, 10657790), (4, 5328895), (5, 4263116), (10, 2131558), (11, 1937780), (13, 1639660), (20, 1065779), (22, 968890), (26, 819830), (29, 735020), (44, 484445), (52, 409915), (55, 387556), (58, 367510), (65, 327932), (110, 193778), (116, 183755), (130, 163966), (143, 149060), (145, 147004), (220, 96889), (257, 82940), (260, 81983), (286, 74530), (290, 73502), (319, 66820), (377, 56540), (514, 41470), (572, 37265), (580, 36751), (638, 33410), (715, 29812), (754, 28270), (1028, 20735), (1276, 16705), (1285, 16588), (1430, 14906), (1508, 14135), (1595, 13364), (1885, 11308), (2570, 8294), (2827, 7540), (2860, 7453), (3190, 6682), (3341, 6380), (3770, 5654), (4147, 5140)]