21811910

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{991}}^1$

素因数の和:1100

約数の個数: 32

約数和(自身を含む): 41140224

約数和(自身を除く): 19328314

約数列:

[1, 2, 5, 10, 31, 62, 71, 142, 155, 310, 355, 710, 991, 1982, 2201, 4402, 4955, 9910, 11005, 22010, 30721, 61442, 70361, 140722, 153605, 307210, 351805, 703610, 2181191, 4362382, 10905955, 21811910]

約数ペア:

[(1, 21811910), (2, 10905955), (5, 4362382), (10, 2181191), (31, 703610), (62, 351805), (71, 307210), (142, 153605), (155, 140722), (310, 70361), (355, 61442), (710, 30721), (991, 22010), (1982, 11005), (2201, 9910), (4402, 4955)]