19804575

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{317}}^1$

素因数の和:361

約数の個数: 72

約数和(自身を含む): 40457232

約数和(自身を除く): 20652657

約数列:

[1, 3, 5, 7, 15, 17, 21, 25, 35, 49, 51, 75, 85, 105, 119, 147, 175, 245, 255, 317, 357, 425, 525, 595, 735, 833, 951, 1225, 1275, 1585, 1785, 2219, 2499, 2975, 3675, 4165, 4755, 5389, 6657, 7925, 8925, 11095, 12495, 15533, 16167, 20825, 23775, 26945, 33285, 37723, 46599, 55475, 62475, 77665, 80835, 113169, 134725, 166425, 188615, 232995, 264061, 388325, 404175, 565845, 792183, 943075, 1164975, 1320305, 2829225, 3960915, 6601525, 19804575]

約数ペア:

[(1, 19804575), (3, 6601525), (5, 3960915), (7, 2829225), (15, 1320305), (17, 1164975), (21, 943075), (25, 792183), (35, 565845), (49, 404175), (51, 388325), (75, 264061), (85, 232995), (105, 188615), (119, 166425), (147, 134725), (175, 113169), (245, 80835), (255, 77665), (317, 62475), (357, 55475), (425, 46599), (525, 37723), (595, 33285), (735, 26945), (833, 23775), (951, 20825), (1225, 16167), (1275, 15533), (1585, 12495), (1785, 11095), (2219, 8925), (2499, 7925), (2975, 6657), (3675, 5389), (4165, 4755)]