21091160

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{233}}^1$

素因数の和:348

約数の個数: 64

約数和(自身を含む): 49870080

約数和(自身を除く): 28778920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 73, 124, 146, 155, 233, 248, 292, 310, 365, 466, 584, 620, 730, 932, 1165, 1240, 1460, 1864, 2263, 2330, 2920, 4526, 4660, 7223, 9052, 9320, 11315, 14446, 17009, 18104, 22630, 28892, 34018, 36115, 45260, 57784, 68036, 72230, 85045, 90520, 136072, 144460, 170090, 288920, 340180, 527279, 680360, 1054558, 2109116, 2636395, 4218232, 5272790, 10545580, 21091160]

約数ペア:

[(1, 21091160), (2, 10545580), (4, 5272790), (5, 4218232), (8, 2636395), (10, 2109116), (20, 1054558), (31, 680360), (40, 527279), (62, 340180), (73, 288920), (124, 170090), (146, 144460), (155, 136072), (233, 90520), (248, 85045), (292, 72230), (310, 68036), (365, 57784), (466, 45260), (584, 36115), (620, 34018), (730, 28892), (932, 22630), (1165, 18104), (1240, 17009), (1460, 14446), (1864, 11315), (2263, 9320), (2330, 9052), (2920, 7223), (4526, 4660)]