19789820

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{569}}^1$

素因数の和:662

約数の個数: 48

約数和(自身を含む): 43666560

約数和(自身を除く): 23876740

約数列:

[1, 2, 4, 5, 10, 20, 37, 47, 74, 94, 148, 185, 188, 235, 370, 470, 569, 740, 940, 1138, 1739, 2276, 2845, 3478, 5690, 6956, 8695, 11380, 17390, 21053, 26743, 34780, 42106, 53486, 84212, 105265, 106972, 133715, 210530, 267430, 421060, 534860, 989491, 1978982, 3957964, 4947455, 9894910, 19789820]

約数ペア:

[(1, 19789820), (2, 9894910), (4, 4947455), (5, 3957964), (10, 1978982), (20, 989491), (37, 534860), (47, 421060), (74, 267430), (94, 210530), (148, 133715), (185, 106972), (188, 105265), (235, 84212), (370, 53486), (470, 42106), (569, 34780), (740, 26743), (940, 21053), (1138, 17390), (1739, 11380), (2276, 8695), (2845, 6956), (3478, 5690)]