20397380

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{167}}^1\times {\mathrm{197}}^1$

素因数の和:404

約数の個数: 48

約数和(自身を含む): 44706816

約数和(自身を除く): 24309436

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 167, 197, 310, 334, 394, 620, 668, 788, 835, 985, 1670, 1970, 3340, 3940, 5177, 6107, 10354, 12214, 20708, 24428, 25885, 30535, 32899, 51770, 61070, 65798, 103540, 122140, 131596, 164495, 328990, 657980, 1019869, 2039738, 4079476, 5099345, 10198690, 20397380]

約数ペア:

[(1, 20397380), (2, 10198690), (4, 5099345), (5, 4079476), (10, 2039738), (20, 1019869), (31, 657980), (62, 328990), (124, 164495), (155, 131596), (167, 122140), (197, 103540), (310, 65798), (334, 61070), (394, 51770), (620, 32899), (668, 30535), (788, 25885), (835, 24428), (985, 20708), (1670, 12214), (1970, 10354), (3340, 6107), (3940, 5177)]