20718750

素因数分解:

$2^1\times 3^1\times 5^6\times {\mathrm{13}}^1\times {\mathrm{17}}^1$

素因数の和:65

約数の個数: 112

約数和(自身を含む): 59061744

約数和(自身を除く): 38342994

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 17, 25, 26, 30, 34, 39, 50, 51, 65, 75, 78, 85, 102, 125, 130, 150, 170, 195, 221, 250, 255, 325, 375, 390, 425, 442, 510, 625, 650, 663, 750, 850, 975, 1105, 1250, 1275, 1326, 1625, 1875, 1950, 2125, 2210, 2550, 3125, 3250, 3315, 3750, 4250, 4875, 5525, 6250, 6375, 6630, 8125, 9375, 9750, 10625, 11050, 12750, 15625, 16250, 16575, 18750, 21250, 24375, 27625, 31250, 31875, 33150, 40625, 46875, 48750, 53125, 55250, 63750, 81250, 82875, 93750, 106250, 121875, 138125, 159375, 165750, 203125, 243750, 265625, 276250, 318750, 406250, 414375, 531250, 609375, 690625, 796875, 828750, 1218750, 1381250, 1593750, 2071875, 3453125, 4143750, 6906250, 10359375, 20718750]

約数ペア:

[(1, 20718750), (2, 10359375), (3, 6906250), (5, 4143750), (6, 3453125), (10, 2071875), (13, 1593750), (15, 1381250), (17, 1218750), (25, 828750), (26, 796875), (30, 690625), (34, 609375), (39, 531250), (50, 414375), (51, 406250), (65, 318750), (75, 276250), (78, 265625), (85, 243750), (102, 203125), (125, 165750), (130, 159375), (150, 138125), (170, 121875), (195, 106250), (221, 93750), (250, 82875), (255, 81250), (325, 63750), (375, 55250), (390, 53125), (425, 48750), (442, 46875), (510, 40625), (625, 33150), (650, 31875), (663, 31250), (750, 27625), (850, 24375), (975, 21250), (1105, 18750), (1250, 16575), (1275, 16250), (1326, 15625), (1625, 12750), (1875, 11050), (1950, 10625), (2125, 9750), (2210, 9375), (2550, 8125), (3125, 6630), (3250, 6375), (3315, 6250), (3750, 5525), (4250, 4875)]