64712500

素因数分解:

$2^2\times 5^5\times {\mathrm{31}}^1\times {\mathrm{167}}^1$

素因数の和:227

約数の個数: 72

約数和(自身を含む): 146990592

約数和(自身を除く): 82278092

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 100, 124, 125, 155, 167, 250, 310, 334, 500, 620, 625, 668, 775, 835, 1250, 1550, 1670, 2500, 3100, 3125, 3340, 3875, 4175, 5177, 6250, 7750, 8350, 10354, 12500, 15500, 16700, 19375, 20708, 20875, 25885, 38750, 41750, 51770, 77500, 83500, 96875, 103540, 104375, 129425, 193750, 208750, 258850, 387500, 417500, 517700, 521875, 647125, 1043750, 1294250, 2087500, 2588500, 3235625, 6471250, 12942500, 16178125, 32356250, 64712500]

約数ペア:

[(1, 64712500), (2, 32356250), (4, 16178125), (5, 12942500), (10, 6471250), (20, 3235625), (25, 2588500), (31, 2087500), (50, 1294250), (62, 1043750), (100, 647125), (124, 521875), (125, 517700), (155, 417500), (167, 387500), (250, 258850), (310, 208750), (334, 193750), (500, 129425), (620, 104375), (625, 103540), (668, 96875), (775, 83500), (835, 77500), (1250, 51770), (1550, 41750), (1670, 38750), (2500, 25885), (3100, 20875), (3125, 20708), (3340, 19375), (3875, 16700), (4175, 15500), (5177, 12500), (6250, 10354), (7750, 8350)]