21505000

素因数分解:

$2^3\times 5^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1$

素因数の和:77

約数の個数: 160

約数和(自身を含む): 60730560

約数和(自身を除く): 39225560

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 23, 25, 34, 40, 44, 46, 50, 55, 68, 85, 88, 92, 100, 110, 115, 125, 136, 170, 184, 187, 200, 220, 230, 250, 253, 275, 340, 374, 391, 425, 440, 460, 500, 506, 550, 575, 625, 680, 748, 782, 850, 920, 935, 1000, 1012, 1100, 1150, 1250, 1265, 1375, 1496, 1564, 1700, 1870, 1955, 2024, 2125, 2200, 2300, 2500, 2530, 2750, 2875, 3128, 3400, 3740, 3910, 4250, 4301, 4600, 4675, 5000, 5060, 5500, 5750, 6325, 6875, 7480, 7820, 8500, 8602, 9350, 9775, 10120, 10625, 11000, 11500, 12650, 13750, 14375, 15640, 17000, 17204, 18700, 19550, 21250, 21505, 23000, 23375, 25300, 27500, 28750, 31625, 34408, 37400, 39100, 42500, 43010, 46750, 48875, 50600, 55000, 57500, 63250, 78200, 85000, 86020, 93500, 97750, 107525, 115000, 116875, 126500, 158125, 172040, 187000, 195500, 215050, 233750, 244375, 253000, 316250, 391000, 430100, 467500, 488750, 537625, 632500, 860200, 935000, 977500, 1075250, 1265000, 1955000, 2150500, 2688125, 4301000, 5376250, 10752500, 21505000]

約数ペア:

[(1, 21505000), (2, 10752500), (4, 5376250), (5, 4301000), (8, 2688125), (10, 2150500), (11, 1955000), (17, 1265000), (20, 1075250), (22, 977500), (23, 935000), (25, 860200), (34, 632500), (40, 537625), (44, 488750), (46, 467500), (50, 430100), (55, 391000), (68, 316250), (85, 253000), (88, 244375), (92, 233750), (100, 215050), (110, 195500), (115, 187000), (125, 172040), (136, 158125), (170, 126500), (184, 116875), (187, 115000), (200, 107525), (220, 97750), (230, 93500), (250, 86020), (253, 85000), (275, 78200), (340, 63250), (374, 57500), (391, 55000), (425, 50600), (440, 48875), (460, 46750), (500, 43010), (506, 42500), (550, 39100), (575, 37400), (625, 34408), (680, 31625), (748, 28750), (782, 27500), (850, 25300), (920, 23375), (935, 23000), (1000, 21505), (1012, 21250), (1100, 19550), (1150, 18700), (1250, 17204), (1265, 17000), (1375, 15640), (1496, 14375), (1564, 13750), (1700, 12650), (1870, 11500), (1955, 11000), (2024, 10625), (2125, 10120), (2200, 9775), (2300, 9350), (2500, 8602), (2530, 8500), (2750, 7820), (2875, 7480), (3128, 6875), (3400, 6325), (3740, 5750), (3910, 5500), (4250, 5060), (4301, 5000), (4600, 4675)]