18251875

素因数分解:

$5^4\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1$

素因数の和:121

約数の個数: 40

約数和(自身を含む): 25304400

約数和(自身を除く): 7052525

約数列:

[1, 5, 19, 25, 29, 53, 95, 125, 145, 265, 475, 551, 625, 725, 1007, 1325, 1537, 2375, 2755, 3625, 5035, 6625, 7685, 11875, 13775, 18125, 25175, 29203, 33125, 38425, 68875, 125875, 146015, 192125, 344375, 629375, 730075, 960625, 3650375, 18251875]

約数ペア:

[(1, 18251875), (5, 3650375), (19, 960625), (25, 730075), (29, 629375), (53, 344375), (95, 192125), (125, 146015), (145, 125875), (265, 68875), (475, 38425), (551, 33125), (625, 29203), (725, 25175), (1007, 18125), (1325, 13775), (1537, 11875), (2375, 7685), (2755, 6625), (3625, 5035)]