20740455

素因数分解:

$3^4\times 5^1\times {\mathrm{83}}^1\times {\mathrm{617}}^1$

素因数の和:717

約数の個数: 40

約数和(自身を含む): 37688112

約数和(自身を除く): 16947657

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 83, 135, 249, 405, 415, 617, 747, 1245, 1851, 2241, 3085, 3735, 5553, 6723, 9255, 11205, 16659, 27765, 33615, 49977, 51211, 83295, 153633, 249885, 256055, 460899, 768165, 1382697, 2304495, 4148091, 6913485, 20740455]

約数ペア:

[(1, 20740455), (3, 6913485), (5, 4148091), (9, 2304495), (15, 1382697), (27, 768165), (45, 460899), (81, 256055), (83, 249885), (135, 153633), (249, 83295), (405, 51211), (415, 49977), (617, 33615), (747, 27765), (1245, 16659), (1851, 11205), (2241, 9255), (3085, 6723), (3735, 5553)]