100019980

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1\times {\mathrm{677}}^1$

素因数の和:858

約数の個数: 48

約数和(自身を含む): 215278560

約数和(自身を除く): 115258580

約数列:

[1, 2, 4, 5, 10, 20, 83, 89, 166, 178, 332, 356, 415, 445, 677, 830, 890, 1354, 1660, 1780, 2708, 3385, 6770, 7387, 13540, 14774, 29548, 36935, 56191, 60253, 73870, 112382, 120506, 147740, 224764, 241012, 280955, 301265, 561910, 602530, 1123820, 1205060, 5000999, 10001998, 20003996, 25004995, 50009990, 100019980]

約数ペア:

[(1, 100019980), (2, 50009990), (4, 25004995), (5, 20003996), (10, 10001998), (20, 5000999), (83, 1205060), (89, 1123820), (166, 602530), (178, 561910), (332, 301265), (356, 280955), (415, 241012), (445, 224764), (677, 147740), (830, 120506), (890, 112382), (1354, 73870), (1660, 60253), (1780, 56191), (2708, 36935), (3385, 29548), (6770, 14774), (7387, 13540)]