20479420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{73}}^1\times {\mathrm{83}}^1$

素因数の和:191

約数の個数: 72

約数和(自身を含む): 47776176

約数和(自身を除く): 27296756

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 73, 83, 130, 146, 166, 169, 260, 292, 332, 338, 365, 415, 676, 730, 830, 845, 949, 1079, 1460, 1660, 1690, 1898, 2158, 3380, 3796, 4316, 4745, 5395, 6059, 9490, 10790, 12118, 12337, 14027, 18980, 21580, 24236, 24674, 28054, 30295, 49348, 56108, 60590, 61685, 70135, 78767, 121180, 123370, 140270, 157534, 246740, 280540, 315068, 393835, 787670, 1023971, 1575340, 2047942, 4095884, 5119855, 10239710, 20479420]

約数ペア:

[(1, 20479420), (2, 10239710), (4, 5119855), (5, 4095884), (10, 2047942), (13, 1575340), (20, 1023971), (26, 787670), (52, 393835), (65, 315068), (73, 280540), (83, 246740), (130, 157534), (146, 140270), (166, 123370), (169, 121180), (260, 78767), (292, 70135), (332, 61685), (338, 60590), (365, 56108), (415, 49348), (676, 30295), (730, 28054), (830, 24674), (845, 24236), (949, 21580), (1079, 18980), (1460, 14027), (1660, 12337), (1690, 12118), (1898, 10790), (2158, 9490), (3380, 6059), (3796, 5395), (4316, 4745)]