21201830

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{5261}}^1$

素因数の和:5312

約数の個数: 32

約数和(自身を含む): 42432768

約数和(自身を除く): 21230938

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 2015, 4030, 5261, 10522, 26305, 52610, 68393, 136786, 163091, 326182, 341965, 683930, 815455, 1630910, 2120183, 4240366, 10600915, 21201830]

約数ペア:

[(1, 21201830), (2, 10600915), (5, 4240366), (10, 2120183), (13, 1630910), (26, 815455), (31, 683930), (62, 341965), (65, 326182), (130, 163091), (155, 136786), (310, 68393), (403, 52610), (806, 26305), (2015, 10522), (4030, 5261)]