20187500

素因数分解:

$2^2\times 5^6\times {\mathrm{17}}^1\times {\mathrm{19}}^1$

素因数の和:70

約数の個数: 84

約数和(自身を含む): 49218120

約数和(自身を除く): 29030620

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 25, 34, 38, 50, 68, 76, 85, 95, 100, 125, 170, 190, 250, 323, 340, 380, 425, 475, 500, 625, 646, 850, 950, 1250, 1292, 1615, 1700, 1900, 2125, 2375, 2500, 3125, 3230, 4250, 4750, 6250, 6460, 8075, 8500, 9500, 10625, 11875, 12500, 15625, 16150, 21250, 23750, 31250, 32300, 40375, 42500, 47500, 53125, 59375, 62500, 80750, 106250, 118750, 161500, 201875, 212500, 237500, 265625, 296875, 403750, 531250, 593750, 807500, 1009375, 1062500, 1187500, 2018750, 4037500, 5046875, 10093750, 20187500]

約数ペア:

[(1, 20187500), (2, 10093750), (4, 5046875), (5, 4037500), (10, 2018750), (17, 1187500), (19, 1062500), (20, 1009375), (25, 807500), (34, 593750), (38, 531250), (50, 403750), (68, 296875), (76, 265625), (85, 237500), (95, 212500), (100, 201875), (125, 161500), (170, 118750), (190, 106250), (250, 80750), (323, 62500), (340, 59375), (380, 53125), (425, 47500), (475, 42500), (500, 40375), (625, 32300), (646, 31250), (850, 23750), (950, 21250), (1250, 16150), (1292, 15625), (1615, 12500), (1700, 11875), (1900, 10625), (2125, 9500), (2375, 8500), (2500, 8075), (3125, 6460), (3230, 6250), (4250, 4750)]