20347840825

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{1021}}^1$

素因数の和:1199

約数の個数: 72

約数和(自身を含む): 28177337160

約数和(自身を除く): 7829496335

約数列:

[1, 5, 13, 25, 53, 65, 89, 169, 265, 325, 445, 689, 845, 1021, 1157, 1325, 2225, 3445, 4225, 4717, 5105, 5785, 8957, 13273, 15041, 17225, 23585, 25525, 28925, 44785, 54113, 61321, 66365, 75205, 90869, 117925, 172549, 223925, 270565, 306605, 331825, 376025, 454345, 703469, 797173, 862745, 1181297, 1352825, 1533025, 2271725, 3517345, 3985865, 4313725, 4816057, 5906485, 9145097, 15356861, 17586725, 19929325, 24080285, 29532425, 45725485, 62608741, 76784305, 120401425, 228627425, 313043705, 383921525, 813913633, 1565218525, 4069568165, 20347840825]

約数ペア:

[(1, 20347840825), (5, 4069568165), (13, 1565218525), (25, 813913633), (53, 383921525), (65, 313043705), (89, 228627425), (169, 120401425), (265, 76784305), (325, 62608741), (445, 45725485), (689, 29532425), (845, 24080285), (1021, 19929325), (1157, 17586725), (1325, 15356861), (2225, 9145097), (3445, 5906485), (4225, 4816057), (4717, 4313725), (5105, 3985865), (5785, 3517345), (8957, 2271725), (13273, 1533025), (15041, 1352825), (17225, 1181297), (23585, 862745), (25525, 797173), (28925, 703469), (44785, 454345), (54113, 376025), (61321, 331825), (66365, 306605), (75205, 270565), (90869, 223925), (117925, 172549)]