21347560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{673}}^1$

素因数の和:758

約数の個数: 64

約数和(自身を含む): 52652880

約数和(自身を除く): 31305320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 61, 65, 104, 122, 130, 244, 260, 305, 488, 520, 610, 673, 793, 1220, 1346, 1586, 2440, 2692, 3172, 3365, 3965, 5384, 6344, 6730, 7930, 8749, 13460, 15860, 17498, 26920, 31720, 34996, 41053, 43745, 69992, 82106, 87490, 164212, 174980, 205265, 328424, 349960, 410530, 533689, 821060, 1067378, 1642120, 2134756, 2668445, 4269512, 5336890, 10673780, 21347560]

約数ペア:

[(1, 21347560), (2, 10673780), (4, 5336890), (5, 4269512), (8, 2668445), (10, 2134756), (13, 1642120), (20, 1067378), (26, 821060), (40, 533689), (52, 410530), (61, 349960), (65, 328424), (104, 205265), (122, 174980), (130, 164212), (244, 87490), (260, 82106), (305, 69992), (488, 43745), (520, 41053), (610, 34996), (673, 31720), (793, 26920), (1220, 17498), (1346, 15860), (1586, 13460), (2440, 8749), (2692, 7930), (3172, 6730), (3365, 6344), (3965, 5384)]