21013850

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2939}}^1$

素因数の和:2975

約数の個数: 48

約数和(自身を含む): 45934560

約数和(自身を除く): 24920710

約数列:

[1, 2, 5, 10, 11, 13, 22, 25, 26, 50, 55, 65, 110, 130, 143, 275, 286, 325, 550, 650, 715, 1430, 2939, 3575, 5878, 7150, 14695, 29390, 32329, 38207, 64658, 73475, 76414, 146950, 161645, 191035, 323290, 382070, 420277, 808225, 840554, 955175, 1616450, 1910350, 2101385, 4202770, 10506925, 21013850]

約数ペア:

[(1, 21013850), (2, 10506925), (5, 4202770), (10, 2101385), (11, 1910350), (13, 1616450), (22, 955175), (25, 840554), (26, 808225), (50, 420277), (55, 382070), (65, 323290), (110, 191035), (130, 161645), (143, 146950), (275, 76414), (286, 73475), (325, 64658), (550, 38207), (650, 32329), (715, 29390), (1430, 14695), (2939, 7150), (3575, 5878)]