20102500

素因数分解:

$2^2\times 5^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1$

素因数の和:95

約数の個数: 120

約数和(自身を含む): 51958368

約数和(自身を除く): 31855868

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 25, 34, 43, 44, 50, 55, 68, 85, 86, 100, 110, 125, 170, 172, 187, 215, 220, 250, 275, 340, 374, 425, 430, 473, 500, 550, 625, 731, 748, 850, 860, 935, 946, 1075, 1100, 1250, 1375, 1462, 1700, 1870, 1892, 2125, 2150, 2365, 2500, 2750, 2924, 3655, 3740, 4250, 4300, 4675, 4730, 5375, 5500, 6875, 7310, 8041, 8500, 9350, 9460, 10625, 10750, 11825, 13750, 14620, 16082, 18275, 18700, 21250, 21500, 23375, 23650, 26875, 27500, 32164, 36550, 40205, 42500, 46750, 47300, 53750, 59125, 73100, 80410, 91375, 93500, 107500, 116875, 118250, 160820, 182750, 201025, 233750, 236500, 295625, 365500, 402050, 456875, 467500, 591250, 804100, 913750, 1005125, 1182500, 1827500, 2010250, 4020500, 5025625, 10051250, 20102500]

約数ペア:

[(1, 20102500), (2, 10051250), (4, 5025625), (5, 4020500), (10, 2010250), (11, 1827500), (17, 1182500), (20, 1005125), (22, 913750), (25, 804100), (34, 591250), (43, 467500), (44, 456875), (50, 402050), (55, 365500), (68, 295625), (85, 236500), (86, 233750), (100, 201025), (110, 182750), (125, 160820), (170, 118250), (172, 116875), (187, 107500), (215, 93500), (220, 91375), (250, 80410), (275, 73100), (340, 59125), (374, 53750), (425, 47300), (430, 46750), (473, 42500), (500, 40205), (550, 36550), (625, 32164), (731, 27500), (748, 26875), (850, 23650), (860, 23375), (935, 21500), (946, 21250), (1075, 18700), (1100, 18275), (1250, 16082), (1375, 14620), (1462, 13750), (1700, 11825), (1870, 10750), (1892, 10625), (2125, 9460), (2150, 9350), (2365, 8500), (2500, 8041), (2750, 7310), (2924, 6875), (3655, 5500), (3740, 5375), (4250, 4730), (4300, 4675)]