20906860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{191}}^1\times {\mathrm{421}}^1$

素因数の和:634

約数の個数: 48

約数和(自身を含む): 47642112

約数和(自身を除く): 26735252

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 191, 260, 382, 421, 764, 842, 955, 1684, 1910, 2105, 2483, 3820, 4210, 4966, 5473, 8420, 9932, 10946, 12415, 21892, 24830, 27365, 49660, 54730, 80411, 109460, 160822, 321644, 402055, 804110, 1045343, 1608220, 2090686, 4181372, 5226715, 10453430, 20906860]

約数ペア:

[(1, 20906860), (2, 10453430), (4, 5226715), (5, 4181372), (10, 2090686), (13, 1608220), (20, 1045343), (26, 804110), (52, 402055), (65, 321644), (130, 160822), (191, 109460), (260, 80411), (382, 54730), (421, 49660), (764, 27365), (842, 24830), (955, 21892), (1684, 12415), (1910, 10946), (2105, 9932), (2483, 8420), (3820, 5473), (4210, 4966)]