19983220

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{167}}^1\times {\mathrm{193}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 43803648

約数和(自身を除く): 23820428

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 167, 193, 310, 334, 386, 620, 668, 772, 835, 965, 1670, 1930, 3340, 3860, 5177, 5983, 10354, 11966, 20708, 23932, 25885, 29915, 32231, 51770, 59830, 64462, 103540, 119660, 128924, 161155, 322310, 644620, 999161, 1998322, 3996644, 4995805, 9991610, 19983220]

約数ペア:

[(1, 19983220), (2, 9991610), (4, 4995805), (5, 3996644), (10, 1998322), (20, 999161), (31, 644620), (62, 322310), (124, 161155), (155, 128924), (167, 119660), (193, 103540), (310, 64462), (334, 59830), (386, 51770), (620, 32231), (668, 29915), (772, 25885), (835, 23932), (965, 20708), (1670, 11966), (1930, 10354), (3340, 5983), (3860, 5177)]