21315455

素因数分解:

$5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{2731}}^1$

素因数の和:2966

約数の個数: 16

約数和(自身を含む): 29374464

約数和(自身を除く): 8059009

約数列:

[1, 5, 7, 35, 223, 1115, 1561, 2731, 7805, 13655, 19117, 95585, 609013, 3045065, 4263091, 21315455]

約数ペア:

[(1, 21315455), (5, 4263091), (7, 3045065), (35, 609013), (223, 95585), (1115, 19117), (1561, 13655), (2731, 7805)]