21238750

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{1307}}^1$

素因数の和:1342

約数の個数: 40

約数和(自身を含む): 42905016

約数和(自身を除く): 21666266

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 325, 625, 650, 1250, 1307, 1625, 2614, 3250, 6535, 8125, 13070, 16250, 16991, 32675, 33982, 65350, 84955, 163375, 169910, 326750, 424775, 816875, 849550, 1633750, 2123875, 4247750, 10619375, 21238750]

約数ペア:

[(1, 21238750), (2, 10619375), (5, 4247750), (10, 2123875), (13, 1633750), (25, 849550), (26, 816875), (50, 424775), (65, 326750), (125, 169910), (130, 163375), (250, 84955), (325, 65350), (625, 33982), (650, 32675), (1250, 16991), (1307, 16250), (1625, 13070), (2614, 8125), (3250, 6535)]