21808810

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{70351}}^1$

素因数の和:70389

約数の個数: 16

約数和(自身を含む): 40522752

約数和(自身を除く): 18713942

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 70351, 140702, 351755, 703510, 2180881, 4361762, 10904405, 21808810]

約数ペア:

[(1, 21808810), (2, 10904405), (5, 4361762), (10, 2180881), (31, 703510), (62, 351755), (155, 140702), (310, 70351)]