21630980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{367}}^1\times {\mathrm{421}}^1$

素因数の和:804

約数の個数: 48

約数和(自身を含む): 52179456

約数和(自身を除く): 30548476

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 367, 421, 734, 842, 1468, 1684, 1835, 2105, 2569, 2947, 3670, 4210, 5138, 5894, 7340, 8420, 10276, 11788, 12845, 14735, 25690, 29470, 51380, 58940, 154507, 309014, 618028, 772535, 1081549, 1545070, 2163098, 3090140, 4326196, 5407745, 10815490, 21630980]

約数ペア:

[(1, 21630980), (2, 10815490), (4, 5407745), (5, 4326196), (7, 3090140), (10, 2163098), (14, 1545070), (20, 1081549), (28, 772535), (35, 618028), (70, 309014), (140, 154507), (367, 58940), (421, 51380), (734, 29470), (842, 25690), (1468, 14735), (1684, 12845), (1835, 11788), (2105, 10276), (2569, 8420), (2947, 7340), (3670, 5894), (4210, 5138)]