21429910

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^2\times {\mathrm{61}}^1$

素因数の和:173

約数の個数: 48

約数和(自身を含む): 42251760

約数和(自身を除く): 20821850

約数列:

[1, 2, 5, 10, 19, 38, 43, 61, 86, 95, 122, 190, 215, 305, 430, 610, 817, 1159, 1634, 1849, 2318, 2623, 3698, 4085, 5246, 5795, 8170, 9245, 11590, 13115, 18490, 26230, 35131, 49837, 70262, 99674, 112789, 175655, 225578, 249185, 351310, 498370, 563945, 1127890, 2142991, 4285982, 10714955, 21429910]

約数ペア:

[(1, 21429910), (2, 10714955), (5, 4285982), (10, 2142991), (19, 1127890), (38, 563945), (43, 498370), (61, 351310), (86, 249185), (95, 225578), (122, 175655), (190, 112789), (215, 99674), (305, 70262), (430, 49837), (610, 35131), (817, 26230), (1159, 18490), (1634, 13115), (1849, 11590), (2318, 9245), (2623, 8170), (3698, 5795), (4085, 5246)]