20301385

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:225

約数の個数: 32

約数和(自身を含む): 27433728

約数和(自身を除く): 7132343

約数列:

[1, 5, 13, 53, 65, 71, 83, 265, 355, 415, 689, 923, 1079, 3445, 3763, 4399, 4615, 5395, 5893, 18815, 21995, 29465, 48919, 57187, 76609, 244595, 285935, 312329, 383045, 1561645, 4060277, 20301385]

約数ペア:

[(1, 20301385), (5, 4060277), (13, 1561645), (53, 383045), (65, 312329), (71, 285935), (83, 244595), (265, 76609), (355, 57187), (415, 48919), (689, 29465), (923, 21995), (1079, 18815), (3445, 5893), (3763, 5395), (4399, 4615)]