87883940

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1\times {\mathrm{509}}^1$

素因数の和:704

約数の個数: 48

約数和(自身を含む): 188924400

約数和(自身を除く): 101040460

約数列:

[1, 2, 4, 5, 10, 20, 89, 97, 178, 194, 356, 388, 445, 485, 509, 890, 970, 1018, 1780, 1940, 2036, 2545, 5090, 8633, 10180, 17266, 34532, 43165, 45301, 49373, 86330, 90602, 98746, 172660, 181204, 197492, 226505, 246865, 453010, 493730, 906020, 987460, 4394197, 8788394, 17576788, 21970985, 43941970, 87883940]

約数ペア:

[(1, 87883940), (2, 43941970), (4, 21970985), (5, 17576788), (10, 8788394), (20, 4394197), (89, 987460), (97, 906020), (178, 493730), (194, 453010), (356, 246865), (388, 226505), (445, 197492), (485, 181204), (509, 172660), (890, 98746), (970, 90602), (1018, 86330), (1780, 49373), (1940, 45301), (2036, 43165), (2545, 34532), (5090, 17266), (8633, 10180)]