20466720

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{233}}^1$

素因数の和:315

約数の個数: 144

約数和(自身を含む): 71292312

約数和(自身を除く): 50825592

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 61, 72, 80, 90, 96, 120, 122, 144, 160, 180, 183, 233, 240, 244, 288, 305, 360, 366, 466, 480, 488, 549, 610, 699, 720, 732, 915, 932, 976, 1098, 1165, 1220, 1398, 1440, 1464, 1830, 1864, 1952, 2097, 2196, 2330, 2440, 2745, 2796, 2928, 3495, 3660, 3728, 4194, 4392, 4660, 4880, 5490, 5592, 5856, 6990, 7320, 7456, 8388, 8784, 9320, 9760, 10485, 10980, 11184, 13980, 14213, 14640, 16776, 17568, 18640, 20970, 21960, 22368, 27960, 28426, 29280, 33552, 37280, 41940, 42639, 43920, 55920, 56852, 67104, 71065, 83880, 85278, 87840, 111840, 113704, 127917, 142130, 167760, 170556, 213195, 227408, 255834, 284260, 335520, 341112, 426390, 454816, 511668, 568520, 639585, 682224, 852780, 1023336, 1137040, 1279170, 1364448, 1705560, 2046672, 2274080, 2558340, 3411120, 4093344, 5116680, 6822240, 10233360, 20466720]

約数ペア:

[(1, 20466720), (2, 10233360), (3, 6822240), (4, 5116680), (5, 4093344), (6, 3411120), (8, 2558340), (9, 2274080), (10, 2046672), (12, 1705560), (15, 1364448), (16, 1279170), (18, 1137040), (20, 1023336), (24, 852780), (30, 682224), (32, 639585), (36, 568520), (40, 511668), (45, 454816), (48, 426390), (60, 341112), (61, 335520), (72, 284260), (80, 255834), (90, 227408), (96, 213195), (120, 170556), (122, 167760), (144, 142130), (160, 127917), (180, 113704), (183, 111840), (233, 87840), (240, 85278), (244, 83880), (288, 71065), (305, 67104), (360, 56852), (366, 55920), (466, 43920), (480, 42639), (488, 41940), (549, 37280), (610, 33552), (699, 29280), (720, 28426), (732, 27960), (915, 22368), (932, 21960), (976, 20970), (1098, 18640), (1165, 17568), (1220, 16776), (1398, 14640), (1440, 14213), (1464, 13980), (1830, 11184), (1864, 10980), (1952, 10485), (2097, 9760), (2196, 9320), (2330, 8784), (2440, 8388), (2745, 7456), (2796, 7320), (2928, 6990), (3495, 5856), (3660, 5592), (3728, 5490), (4194, 4880), (4392, 4660)]