21466980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{239}}^1\times {\mathrm{499}}^1$

素因数の和:753

約数の個数: 72

約数和(自身を含む): 65520000

約数和(自身を除く): 44053020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 239, 478, 499, 717, 956, 998, 1195, 1434, 1497, 1996, 2151, 2390, 2495, 2868, 2994, 3585, 4302, 4491, 4780, 4990, 5988, 7170, 7485, 8604, 8982, 9980, 10755, 14340, 14970, 17964, 21510, 22455, 29940, 43020, 44910, 89820, 119261, 238522, 357783, 477044, 596305, 715566, 1073349, 1192610, 1431132, 1788915, 2146698, 2385220, 3577830, 4293396, 5366745, 7155660, 10733490, 21466980]

約数ペア:

[(1, 21466980), (2, 10733490), (3, 7155660), (4, 5366745), (5, 4293396), (6, 3577830), (9, 2385220), (10, 2146698), (12, 1788915), (15, 1431132), (18, 1192610), (20, 1073349), (30, 715566), (36, 596305), (45, 477044), (60, 357783), (90, 238522), (180, 119261), (239, 89820), (478, 44910), (499, 43020), (717, 29940), (956, 22455), (998, 21510), (1195, 17964), (1434, 14970), (1497, 14340), (1996, 10755), (2151, 9980), (2390, 8982), (2495, 8604), (2868, 7485), (2994, 7170), (3585, 5988), (4302, 4990), (4491, 4780)]