20812500

素因数分解:

$2^2\times 3^2\times 5^6\times {\mathrm{37}}^1$

素因数の和:77

約数の個数: 126

約数和(自身を含む): 67538198

約数和(自身を除く): 46725698

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 37, 45, 50, 60, 74, 75, 90, 100, 111, 125, 148, 150, 180, 185, 222, 225, 250, 300, 333, 370, 375, 444, 450, 500, 555, 625, 666, 740, 750, 900, 925, 1110, 1125, 1250, 1332, 1500, 1665, 1850, 1875, 2220, 2250, 2500, 2775, 3125, 3330, 3700, 3750, 4500, 4625, 5550, 5625, 6250, 6660, 7500, 8325, 9250, 9375, 11100, 11250, 12500, 13875, 15625, 16650, 18500, 18750, 22500, 23125, 27750, 28125, 31250, 33300, 37500, 41625, 46250, 46875, 55500, 56250, 62500, 69375, 83250, 92500, 93750, 112500, 115625, 138750, 140625, 166500, 187500, 208125, 231250, 277500, 281250, 346875, 416250, 462500, 562500, 578125, 693750, 832500, 1040625, 1156250, 1387500, 1734375, 2081250, 2312500, 3468750, 4162500, 5203125, 6937500, 10406250, 20812500]

約数ペア:

[(1, 20812500), (2, 10406250), (3, 6937500), (4, 5203125), (5, 4162500), (6, 3468750), (9, 2312500), (10, 2081250), (12, 1734375), (15, 1387500), (18, 1156250), (20, 1040625), (25, 832500), (30, 693750), (36, 578125), (37, 562500), (45, 462500), (50, 416250), (60, 346875), (74, 281250), (75, 277500), (90, 231250), (100, 208125), (111, 187500), (125, 166500), (148, 140625), (150, 138750), (180, 115625), (185, 112500), (222, 93750), (225, 92500), (250, 83250), (300, 69375), (333, 62500), (370, 56250), (375, 55500), (444, 46875), (450, 46250), (500, 41625), (555, 37500), (625, 33300), (666, 31250), (740, 28125), (750, 27750), (900, 23125), (925, 22500), (1110, 18750), (1125, 18500), (1250, 16650), (1332, 15625), (1500, 13875), (1665, 12500), (1850, 11250), (1875, 11100), (2220, 9375), (2250, 9250), (2500, 8325), (2775, 7500), (3125, 6660), (3330, 6250), (3700, 5625), (3750, 5550), (4500, 4625)]