19638620

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{191}}^1$

素因数の和:350

約数の個数: 48

約数和(自身を含む): 42674688

約数和(自身を除く): 23036068

約数列:

[1, 2, 4, 5, 10, 20, 53, 97, 106, 191, 194, 212, 265, 382, 388, 485, 530, 764, 955, 970, 1060, 1910, 1940, 3820, 5141, 10123, 10282, 18527, 20246, 20564, 25705, 37054, 40492, 50615, 51410, 74108, 92635, 101230, 102820, 185270, 202460, 370540, 981931, 1963862, 3927724, 4909655, 9819310, 19638620]

約数ペア:

[(1, 19638620), (2, 9819310), (4, 4909655), (5, 3927724), (10, 1963862), (20, 981931), (53, 370540), (97, 202460), (106, 185270), (191, 102820), (194, 101230), (212, 92635), (265, 74108), (382, 51410), (388, 50615), (485, 40492), (530, 37054), (764, 25705), (955, 20564), (970, 20246), (1060, 18527), (1910, 10282), (1940, 10123), (3820, 5141)]