21511880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1009}}^1$

素因数の和:1074

約数の個数: 64

約数和(自身を含む): 53449200

約数和(自身を除く): 31937320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 41, 52, 65, 82, 104, 130, 164, 205, 260, 328, 410, 520, 533, 820, 1009, 1066, 1640, 2018, 2132, 2665, 4036, 4264, 5045, 5330, 8072, 10090, 10660, 13117, 20180, 21320, 26234, 40360, 41369, 52468, 65585, 82738, 104936, 131170, 165476, 206845, 262340, 330952, 413690, 524680, 537797, 827380, 1075594, 1654760, 2151188, 2688985, 4302376, 5377970, 10755940, 21511880]

約数ペア:

[(1, 21511880), (2, 10755940), (4, 5377970), (5, 4302376), (8, 2688985), (10, 2151188), (13, 1654760), (20, 1075594), (26, 827380), (40, 537797), (41, 524680), (52, 413690), (65, 330952), (82, 262340), (104, 206845), (130, 165476), (164, 131170), (205, 104936), (260, 82738), (328, 65585), (410, 52468), (520, 41369), (533, 40360), (820, 26234), (1009, 21320), (1066, 20180), (1640, 13117), (2018, 10660), (2132, 10090), (2665, 8072), (4036, 5330), (4264, 5045)]