21052076

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{61}}^1\times {\mathrm{239}}^1$

素因数の和:342

約数の個数: 36

約数和(自身を含む): 39684960

約数和(自身を除く): 18632884

約数列:

[1, 2, 4, 19, 38, 61, 76, 122, 239, 244, 361, 478, 722, 956, 1159, 1444, 2318, 4541, 4636, 9082, 14579, 18164, 22021, 29158, 44042, 58316, 86279, 88084, 172558, 277001, 345116, 554002, 1108004, 5263019, 10526038, 21052076]

約数ペア:

[(1, 21052076), (2, 10526038), (4, 5263019), (19, 1108004), (38, 554002), (61, 345116), (76, 277001), (122, 172558), (239, 88084), (244, 86279), (361, 58316), (478, 44042), (722, 29158), (956, 22021), (1159, 18164), (1444, 14579), (2318, 9082), (4541, 4636)]