19918275

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{659}}^1$

素因数の和:716

約数の個数: 48

約数和(自身を含む): 36664320

約数和(自身を除く): 16746045

約数列:

[1, 3, 5, 13, 15, 25, 31, 39, 65, 75, 93, 155, 195, 325, 403, 465, 659, 775, 975, 1209, 1977, 2015, 2325, 3295, 6045, 8567, 9885, 10075, 16475, 20429, 25701, 30225, 42835, 49425, 61287, 102145, 128505, 214175, 265577, 306435, 510725, 642525, 796731, 1327885, 1532175, 3983655, 6639425, 19918275]

約数ペア:

[(1, 19918275), (3, 6639425), (5, 3983655), (13, 1532175), (15, 1327885), (25, 796731), (31, 642525), (39, 510725), (65, 306435), (75, 265577), (93, 214175), (155, 128505), (195, 102145), (325, 61287), (403, 49425), (465, 42835), (659, 30225), (775, 25701), (975, 20429), (1209, 16475), (1977, 10075), (2015, 9885), (2325, 8567), (3295, 6045)]