21515880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{199}}^1$

素因数の和:283

約数の個数: 128

約数和(自身を含む): 69984000

約数和(自身を除く): 48468120

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 51, 53, 60, 68, 85, 102, 106, 120, 136, 159, 170, 199, 204, 212, 255, 265, 318, 340, 398, 408, 424, 510, 530, 597, 636, 680, 795, 796, 901, 995, 1020, 1060, 1194, 1272, 1590, 1592, 1802, 1990, 2040, 2120, 2388, 2703, 2985, 3180, 3383, 3604, 3980, 4505, 4776, 5406, 5970, 6360, 6766, 7208, 7960, 9010, 10149, 10547, 10812, 11940, 13515, 13532, 16915, 18020, 20298, 21094, 21624, 23880, 27030, 27064, 31641, 33830, 36040, 40596, 42188, 50745, 52735, 54060, 63282, 67660, 81192, 84376, 101490, 105470, 108120, 126564, 135320, 158205, 179299, 202980, 210940, 253128, 316410, 358598, 405960, 421880, 537897, 632820, 717196, 896495, 1075794, 1265640, 1434392, 1792990, 2151588, 2689485, 3585980, 4303176, 5378970, 7171960, 10757940, 21515880]

約数ペア:

[(1, 21515880), (2, 10757940), (3, 7171960), (4, 5378970), (5, 4303176), (6, 3585980), (8, 2689485), (10, 2151588), (12, 1792990), (15, 1434392), (17, 1265640), (20, 1075794), (24, 896495), (30, 717196), (34, 632820), (40, 537897), (51, 421880), (53, 405960), (60, 358598), (68, 316410), (85, 253128), (102, 210940), (106, 202980), (120, 179299), (136, 158205), (159, 135320), (170, 126564), (199, 108120), (204, 105470), (212, 101490), (255, 84376), (265, 81192), (318, 67660), (340, 63282), (398, 54060), (408, 52735), (424, 50745), (510, 42188), (530, 40596), (597, 36040), (636, 33830), (680, 31641), (795, 27064), (796, 27030), (901, 23880), (995, 21624), (1020, 21094), (1060, 20298), (1194, 18020), (1272, 16915), (1590, 13532), (1592, 13515), (1802, 11940), (1990, 10812), (2040, 10547), (2120, 10149), (2388, 9010), (2703, 7960), (2985, 7208), (3180, 6766), (3383, 6360), (3604, 5970), (3980, 5406), (4505, 4776)]