21127730

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{331}}^1\times {\mathrm{491}}^1$

素因数の和:842

約数の個数: 32

約数和(自身を含む): 41162688

約数和(自身を除く): 20034958

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 331, 491, 662, 982, 1655, 2455, 3310, 4303, 4910, 6383, 8606, 12766, 21515, 31915, 43030, 63830, 162521, 325042, 812605, 1625210, 2112773, 4225546, 10563865, 21127730]

約数ペア:

[(1, 21127730), (2, 10563865), (5, 4225546), (10, 2112773), (13, 1625210), (26, 812605), (65, 325042), (130, 162521), (331, 63830), (491, 43030), (662, 31915), (982, 21515), (1655, 12766), (2455, 8606), (3310, 6383), (4303, 4910)]