20165500

素因数分解:

$2^2\times 5^3\times {\mathrm{31}}^1\times {\mathrm{1301}}^1$

素因数の和:1351

約数の個数: 48

約数和(自身を含む): 45497088

約数和(自身を除く): 25331588

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 100, 124, 125, 155, 250, 310, 500, 620, 775, 1301, 1550, 2602, 3100, 3875, 5204, 6505, 7750, 13010, 15500, 26020, 32525, 40331, 65050, 80662, 130100, 161324, 162625, 201655, 325250, 403310, 650500, 806620, 1008275, 2016550, 4033100, 5041375, 10082750, 20165500]

約数ペア:

[(1, 20165500), (2, 10082750), (4, 5041375), (5, 4033100), (10, 2016550), (20, 1008275), (25, 806620), (31, 650500), (50, 403310), (62, 325250), (100, 201655), (124, 162625), (125, 161324), (155, 130100), (250, 80662), (310, 65050), (500, 40331), (620, 32525), (775, 26020), (1301, 15500), (1550, 13010), (2602, 7750), (3100, 6505), (3875, 5204)]