21473620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{941}}^1$

素因数の和:1120

約数の個数: 48

約数和(自身を含む): 51907968

約数和(自身を除く): 30434348

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 163, 326, 652, 815, 941, 1141, 1630, 1882, 2282, 3260, 3764, 4564, 4705, 5705, 6587, 9410, 11410, 13174, 18820, 22820, 26348, 32935, 65870, 131740, 153383, 306766, 613532, 766915, 1073681, 1533830, 2147362, 3067660, 4294724, 5368405, 10736810, 21473620]

約数ペア:

[(1, 21473620), (2, 10736810), (4, 5368405), (5, 4294724), (7, 3067660), (10, 2147362), (14, 1533830), (20, 1073681), (28, 766915), (35, 613532), (70, 306766), (140, 153383), (163, 131740), (326, 65870), (652, 32935), (815, 26348), (941, 22820), (1141, 18820), (1630, 13174), (1882, 11410), (2282, 9410), (3260, 6587), (3764, 5705), (4564, 4705)]