19712500

素因数分解:

$2^2\times 5^5\times {\mathrm{19}}^1\times {\mathrm{83}}^1$

素因数の和:131

約数の個数: 72

約数和(自身を含む): 45934560

約数和(自身を除く): 26222060

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 83, 95, 100, 125, 166, 190, 250, 332, 380, 415, 475, 500, 625, 830, 950, 1250, 1577, 1660, 1900, 2075, 2375, 2500, 3125, 3154, 4150, 4750, 6250, 6308, 7885, 8300, 9500, 10375, 11875, 12500, 15770, 20750, 23750, 31540, 39425, 41500, 47500, 51875, 59375, 78850, 103750, 118750, 157700, 197125, 207500, 237500, 259375, 394250, 518750, 788500, 985625, 1037500, 1971250, 3942500, 4928125, 9856250, 19712500]

約数ペア:

[(1, 19712500), (2, 9856250), (4, 4928125), (5, 3942500), (10, 1971250), (19, 1037500), (20, 985625), (25, 788500), (38, 518750), (50, 394250), (76, 259375), (83, 237500), (95, 207500), (100, 197125), (125, 157700), (166, 118750), (190, 103750), (250, 78850), (332, 59375), (380, 51875), (415, 47500), (475, 41500), (500, 39425), (625, 31540), (830, 23750), (950, 20750), (1250, 15770), (1577, 12500), (1660, 11875), (1900, 10375), (2075, 9500), (2375, 8300), (2500, 7885), (3125, 6308), (3154, 6250), (4150, 4750)]