21212880

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{523}}^1$

素因数の和:565

約数の個数: 120

約数和(自身を含む): 71343648

約数和(自身を除く): 50130768

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 169, 195, 208, 240, 260, 312, 338, 390, 507, 520, 523, 624, 676, 780, 845, 1014, 1040, 1046, 1352, 1560, 1569, 1690, 2028, 2092, 2535, 2615, 2704, 3120, 3138, 3380, 4056, 4184, 5070, 5230, 6276, 6760, 6799, 7845, 8112, 8368, 10140, 10460, 12552, 13520, 13598, 15690, 20280, 20397, 20920, 25104, 27196, 31380, 33995, 40560, 40794, 41840, 54392, 62760, 67990, 81588, 88387, 101985, 108784, 125520, 135980, 163176, 176774, 203970, 265161, 271960, 326352, 353548, 407940, 441935, 530322, 543920, 707096, 815880, 883870, 1060644, 1325805, 1414192, 1631760, 1767740, 2121288, 2651610, 3535480, 4242576, 5303220, 7070960, 10606440, 21212880]

約数ペア:

[(1, 21212880), (2, 10606440), (3, 7070960), (4, 5303220), (5, 4242576), (6, 3535480), (8, 2651610), (10, 2121288), (12, 1767740), (13, 1631760), (15, 1414192), (16, 1325805), (20, 1060644), (24, 883870), (26, 815880), (30, 707096), (39, 543920), (40, 530322), (48, 441935), (52, 407940), (60, 353548), (65, 326352), (78, 271960), (80, 265161), (104, 203970), (120, 176774), (130, 163176), (156, 135980), (169, 125520), (195, 108784), (208, 101985), (240, 88387), (260, 81588), (312, 67990), (338, 62760), (390, 54392), (507, 41840), (520, 40794), (523, 40560), (624, 33995), (676, 31380), (780, 27196), (845, 25104), (1014, 20920), (1040, 20397), (1046, 20280), (1352, 15690), (1560, 13598), (1569, 13520), (1690, 12552), (2028, 10460), (2092, 10140), (2535, 8368), (2615, 8112), (2704, 7845), (3120, 6799), (3138, 6760), (3380, 6276), (4056, 5230), (4184, 5070)]