19875020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1481}}^1$

素因数の和:1562

約数の個数: 48

約数和(自身を含む): 46309536

約数和(自身を除く): 26434516

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 220, 244, 305, 610, 671, 1220, 1342, 1481, 2684, 2962, 3355, 5924, 6710, 7405, 13420, 14810, 16291, 29620, 32582, 65164, 81455, 90341, 162910, 180682, 325820, 361364, 451705, 903410, 993751, 1806820, 1987502, 3975004, 4968755, 9937510, 19875020]

約数ペア:

[(1, 19875020), (2, 9937510), (4, 4968755), (5, 3975004), (10, 1987502), (11, 1806820), (20, 993751), (22, 903410), (44, 451705), (55, 361364), (61, 325820), (110, 180682), (122, 162910), (220, 90341), (244, 81455), (305, 65164), (610, 32582), (671, 29620), (1220, 16291), (1342, 14810), (1481, 13420), (2684, 7405), (2962, 6710), (3355, 5924)]