18436940

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{227}}^1$

素因数の和:398

約数の個数: 48

約数和(自身を含む): 40449024

約数和(自身を除く): 22012084

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 131, 155, 227, 262, 310, 454, 524, 620, 655, 908, 1135, 1310, 2270, 2620, 4061, 4540, 7037, 8122, 14074, 16244, 20305, 28148, 29737, 35185, 40610, 59474, 70370, 81220, 118948, 140740, 148685, 297370, 594740, 921847, 1843694, 3687388, 4609235, 9218470, 18436940]

約数ペア:

[(1, 18436940), (2, 9218470), (4, 4609235), (5, 3687388), (10, 1843694), (20, 921847), (31, 594740), (62, 297370), (124, 148685), (131, 140740), (155, 118948), (227, 81220), (262, 70370), (310, 59474), (454, 40610), (524, 35185), (620, 29737), (655, 28148), (908, 20305), (1135, 16244), (1310, 14074), (2270, 8122), (2620, 7037), (4061, 4540)]