20490470

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1$

素因数の和:150

約数の個数: 128

約数和(自身を含む): 52254720

約数和(自身を除く): 31764250

約数列:

[1, 2, 5, 7, 10, 11, 13, 14, 22, 23, 26, 35, 46, 55, 65, 70, 77, 89, 91, 110, 115, 130, 143, 154, 161, 178, 182, 230, 253, 286, 299, 322, 385, 445, 455, 506, 598, 623, 715, 770, 805, 890, 910, 979, 1001, 1157, 1246, 1265, 1430, 1495, 1610, 1771, 1958, 2002, 2047, 2093, 2314, 2530, 2990, 3115, 3289, 3542, 4094, 4186, 4895, 5005, 5785, 6230, 6578, 6853, 8099, 8855, 9790, 10010, 10235, 10465, 11570, 12727, 13706, 14329, 16198, 16445, 17710, 20470, 20930, 22517, 23023, 25454, 26611, 28658, 32890, 34265, 40495, 45034, 46046, 53222, 63635, 68530, 71645, 80990, 89089, 112585, 115115, 127270, 133055, 143290, 157619, 178178, 186277, 225170, 230230, 266110, 292721, 315238, 372554, 445445, 585442, 788095, 890890, 931385, 1463605, 1576190, 1862770, 2049047, 2927210, 4098094, 10245235, 20490470]

約数ペア:

[(1, 20490470), (2, 10245235), (5, 4098094), (7, 2927210), (10, 2049047), (11, 1862770), (13, 1576190), (14, 1463605), (22, 931385), (23, 890890), (26, 788095), (35, 585442), (46, 445445), (55, 372554), (65, 315238), (70, 292721), (77, 266110), (89, 230230), (91, 225170), (110, 186277), (115, 178178), (130, 157619), (143, 143290), (154, 133055), (161, 127270), (178, 115115), (182, 112585), (230, 89089), (253, 80990), (286, 71645), (299, 68530), (322, 63635), (385, 53222), (445, 46046), (455, 45034), (506, 40495), (598, 34265), (623, 32890), (715, 28658), (770, 26611), (805, 25454), (890, 23023), (910, 22517), (979, 20930), (1001, 20470), (1157, 17710), (1246, 16445), (1265, 16198), (1430, 14329), (1495, 13706), (1610, 12727), (1771, 11570), (1958, 10465), (2002, 10235), (2047, 10010), (2093, 9790), (2314, 8855), (2530, 8099), (2990, 6853), (3115, 6578), (3289, 6230), (3542, 5785), (4094, 5005), (4186, 4895)]