31112500

素因数分解:

$2^2\times 5^5\times {\mathrm{19}}^1\times {\mathrm{131}}^1$

素因数の和:179

約数の個数: 72

約数和(自身を含む): 72182880

約数和(自身を除く): 41070380

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 125, 131, 190, 250, 262, 380, 475, 500, 524, 625, 655, 950, 1250, 1310, 1900, 2375, 2489, 2500, 2620, 3125, 3275, 4750, 4978, 6250, 6550, 9500, 9956, 11875, 12445, 12500, 13100, 16375, 23750, 24890, 32750, 47500, 49780, 59375, 62225, 65500, 81875, 118750, 124450, 163750, 237500, 248900, 311125, 327500, 409375, 622250, 818750, 1244500, 1555625, 1637500, 3111250, 6222500, 7778125, 15556250, 31112500]

約数ペア:

[(1, 31112500), (2, 15556250), (4, 7778125), (5, 6222500), (10, 3111250), (19, 1637500), (20, 1555625), (25, 1244500), (38, 818750), (50, 622250), (76, 409375), (95, 327500), (100, 311125), (125, 248900), (131, 237500), (190, 163750), (250, 124450), (262, 118750), (380, 81875), (475, 65500), (500, 62225), (524, 59375), (625, 49780), (655, 47500), (950, 32750), (1250, 24890), (1310, 23750), (1900, 16375), (2375, 13100), (2489, 12500), (2500, 12445), (2620, 11875), (3125, 9956), (3275, 9500), (4750, 6550), (4978, 6250)]