20688750

素因数分解:

$2^1\times 3^3\times 5^4\times {\mathrm{613}}^1$

素因数の和:644

約数の個数: 80

約数和(自身を含む): 57544080

約数和(自身を除く): 36855330

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 25, 27, 30, 45, 50, 54, 75, 90, 125, 135, 150, 225, 250, 270, 375, 450, 613, 625, 675, 750, 1125, 1226, 1250, 1350, 1839, 1875, 2250, 3065, 3375, 3678, 3750, 5517, 5625, 6130, 6750, 9195, 11034, 11250, 15325, 16551, 16875, 18390, 27585, 30650, 33102, 33750, 45975, 55170, 76625, 82755, 91950, 137925, 153250, 165510, 229875, 275850, 383125, 413775, 459750, 689625, 766250, 827550, 1149375, 1379250, 2068875, 2298750, 3448125, 4137750, 6896250, 10344375, 20688750]

約数ペア:

[(1, 20688750), (2, 10344375), (3, 6896250), (5, 4137750), (6, 3448125), (9, 2298750), (10, 2068875), (15, 1379250), (18, 1149375), (25, 827550), (27, 766250), (30, 689625), (45, 459750), (50, 413775), (54, 383125), (75, 275850), (90, 229875), (125, 165510), (135, 153250), (150, 137925), (225, 91950), (250, 82755), (270, 76625), (375, 55170), (450, 45975), (613, 33750), (625, 33102), (675, 30650), (750, 27585), (1125, 18390), (1226, 16875), (1250, 16551), (1350, 15325), (1839, 11250), (1875, 11034), (2250, 9195), (3065, 6750), (3375, 6130), (3678, 5625), (3750, 5517)]