21407880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13723}}^1$

素因数の和:13750

約数の個数: 64

約数和(自身を含む): 69168960

約数和(自身を除く): 47761080

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13723, 27446, 41169, 54892, 68615, 82338, 109784, 137230, 164676, 178399, 205845, 274460, 329352, 356798, 411690, 535197, 548920, 713596, 823380, 891995, 1070394, 1427192, 1646760, 1783990, 2140788, 2675985, 3567980, 4281576, 5351970, 7135960, 10703940, 21407880]

約数ペア:

[(1, 21407880), (2, 10703940), (3, 7135960), (4, 5351970), (5, 4281576), (6, 3567980), (8, 2675985), (10, 2140788), (12, 1783990), (13, 1646760), (15, 1427192), (20, 1070394), (24, 891995), (26, 823380), (30, 713596), (39, 548920), (40, 535197), (52, 411690), (60, 356798), (65, 329352), (78, 274460), (104, 205845), (120, 178399), (130, 164676), (156, 137230), (195, 109784), (260, 82338), (312, 68615), (390, 54892), (520, 41169), (780, 27446), (1560, 13723)]