19913775

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{83}}^1\times {\mathrm{457}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 38164224

約数和(自身を除く): 18250449

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 83, 105, 175, 249, 415, 457, 525, 581, 1245, 1371, 1743, 2075, 2285, 2905, 3199, 6225, 6855, 8715, 9597, 11425, 14525, 15995, 34275, 37931, 43575, 47985, 79975, 113793, 189655, 239925, 265517, 568965, 796551, 948275, 1327585, 2844825, 3982755, 6637925, 19913775]

約数ペア:

[(1, 19913775), (3, 6637925), (5, 3982755), (7, 2844825), (15, 1327585), (21, 948275), (25, 796551), (35, 568965), (75, 265517), (83, 239925), (105, 189655), (175, 113793), (249, 79975), (415, 47985), (457, 43575), (525, 37931), (581, 34275), (1245, 15995), (1371, 14525), (1743, 11425), (2075, 9597), (2285, 8715), (2905, 6855), (3199, 6225)]