20431980

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{241}}^1$

素因数の和:416

約数の個数: 96

約数和(自身を含む): 64236480

約数和(自身を除く): 43804500

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 90, 108, 135, 157, 180, 241, 270, 314, 471, 482, 540, 628, 723, 785, 942, 964, 1205, 1413, 1446, 1570, 1884, 2169, 2355, 2410, 2826, 2892, 3140, 3615, 4239, 4338, 4710, 4820, 5652, 6507, 7065, 7230, 8478, 8676, 9420, 10845, 13014, 14130, 14460, 16956, 21195, 21690, 26028, 28260, 32535, 37837, 42390, 43380, 65070, 75674, 84780, 113511, 130140, 151348, 189185, 227022, 340533, 378370, 454044, 567555, 681066, 756740, 1021599, 1135110, 1362132, 1702665, 2043198, 2270220, 3405330, 4086396, 5107995, 6810660, 10215990, 20431980]

約数ペア:

[(1, 20431980), (2, 10215990), (3, 6810660), (4, 5107995), (5, 4086396), (6, 3405330), (9, 2270220), (10, 2043198), (12, 1702665), (15, 1362132), (18, 1135110), (20, 1021599), (27, 756740), (30, 681066), (36, 567555), (45, 454044), (54, 378370), (60, 340533), (90, 227022), (108, 189185), (135, 151348), (157, 130140), (180, 113511), (241, 84780), (270, 75674), (314, 65070), (471, 43380), (482, 42390), (540, 37837), (628, 32535), (723, 28260), (785, 26028), (942, 21690), (964, 21195), (1205, 16956), (1413, 14460), (1446, 14130), (1570, 13014), (1884, 10845), (2169, 9420), (2355, 8676), (2410, 8478), (2826, 7230), (2892, 7065), (3140, 6507), (3615, 5652), (4239, 4820), (4338, 4710)]