20161749025

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{311}}^1\times {\mathrm{739}}^1$

素因数の和:1111

約数の個数: 72

約数和(自身を含む): 28557547200

約数和(自身を除く): 8395798175

約数列:

[1, 5, 11, 25, 29, 55, 121, 145, 275, 311, 319, 605, 725, 739, 1555, 1595, 3025, 3421, 3509, 3695, 7775, 7975, 8129, 9019, 17105, 17545, 18475, 21431, 37631, 40645, 45095, 85525, 87725, 89419, 99209, 107155, 188155, 203225, 225475, 229829, 235741, 447095, 496045, 535775, 940775, 1091299, 1149145, 1178705, 2235475, 2480225, 2528119, 2593151, 5456495, 5745725, 5893525, 6665041, 12640595, 12965755, 27282475, 27809309, 33325205, 63202975, 64828775, 73315451, 139046545, 166626025, 366577255, 695232725, 806469961, 1832886275, 4032349805, 20161749025]

約数ペア:

[(1, 20161749025), (5, 4032349805), (11, 1832886275), (25, 806469961), (29, 695232725), (55, 366577255), (121, 166626025), (145, 139046545), (275, 73315451), (311, 64828775), (319, 63202975), (605, 33325205), (725, 27809309), (739, 27282475), (1555, 12965755), (1595, 12640595), (3025, 6665041), (3421, 5893525), (3509, 5745725), (3695, 5456495), (7775, 2593151), (7975, 2528119), (8129, 2480225), (9019, 2235475), (17105, 1178705), (17545, 1149145), (18475, 1091299), (21431, 940775), (37631, 535775), (40645, 496045), (45095, 447095), (85525, 235741), (87725, 229829), (89419, 225475), (99209, 203225), (107155, 188155)]