21977620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{179}}^1\times {\mathrm{877}}^1$

素因数の和:1072

約数の個数: 48

約数和(自身を含む): 53101440

約数和(自身を除く): 31123820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 179, 358, 716, 877, 895, 1253, 1754, 1790, 2506, 3508, 3580, 4385, 5012, 6139, 6265, 8770, 12278, 12530, 17540, 24556, 25060, 30695, 61390, 122780, 156983, 313966, 627932, 784915, 1098881, 1569830, 2197762, 3139660, 4395524, 5494405, 10988810, 21977620]

約数ペア:

[(1, 21977620), (2, 10988810), (4, 5494405), (5, 4395524), (7, 3139660), (10, 2197762), (14, 1569830), (20, 1098881), (28, 784915), (35, 627932), (70, 313966), (140, 156983), (179, 122780), (358, 61390), (716, 30695), (877, 25060), (895, 24556), (1253, 17540), (1754, 12530), (1790, 12278), (2506, 8770), (3508, 6265), (3580, 6139), (4385, 5012)]