21813740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1583}}^1$

素因数の和:1658

約数の個数: 48

約数和(自身を含む): 50295168

約数和(自身を除く): 28481428

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 53, 65, 106, 130, 212, 260, 265, 530, 689, 1060, 1378, 1583, 2756, 3166, 3445, 6332, 6890, 7915, 13780, 15830, 20579, 31660, 41158, 82316, 83899, 102895, 167798, 205790, 335596, 411580, 419495, 838990, 1090687, 1677980, 2181374, 4362748, 5453435, 10906870, 21813740]

約数ペア:

[(1, 21813740), (2, 10906870), (4, 5453435), (5, 4362748), (10, 2181374), (13, 1677980), (20, 1090687), (26, 838990), (52, 419495), (53, 411580), (65, 335596), (106, 205790), (130, 167798), (212, 102895), (260, 83899), (265, 82316), (530, 41158), (689, 31660), (1060, 20579), (1378, 15830), (1583, 13780), (2756, 7915), (3166, 6890), (3445, 6332)]