20896720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{283}}^1$

素因数の和:380

約数の個数: 80

約数和(自身を含む): 53246592

約数和(自身を除く): 32349872

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 71, 80, 104, 130, 142, 208, 260, 283, 284, 355, 520, 566, 568, 710, 923, 1040, 1132, 1136, 1415, 1420, 1846, 2264, 2830, 2840, 3679, 3692, 4528, 4615, 5660, 5680, 7358, 7384, 9230, 11320, 14716, 14768, 18395, 18460, 20093, 22640, 29432, 36790, 36920, 40186, 58864, 73580, 73840, 80372, 100465, 147160, 160744, 200930, 261209, 294320, 321488, 401860, 522418, 803720, 1044836, 1306045, 1607440, 2089672, 2612090, 4179344, 5224180, 10448360, 20896720]

約数ペア:

[(1, 20896720), (2, 10448360), (4, 5224180), (5, 4179344), (8, 2612090), (10, 2089672), (13, 1607440), (16, 1306045), (20, 1044836), (26, 803720), (40, 522418), (52, 401860), (65, 321488), (71, 294320), (80, 261209), (104, 200930), (130, 160744), (142, 147160), (208, 100465), (260, 80372), (283, 73840), (284, 73580), (355, 58864), (520, 40186), (566, 36920), (568, 36790), (710, 29432), (923, 22640), (1040, 20093), (1132, 18460), (1136, 18395), (1415, 14768), (1420, 14716), (1846, 11320), (2264, 9230), (2830, 7384), (2840, 7358), (3679, 5680), (3692, 5660), (4528, 4615)]