20486340

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{229}}^1$

素因数の和:322

約数の個数: 144

約数和(自身を含む): 72334080

約数和(自身を除く): 51847740

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 71, 84, 90, 105, 126, 140, 142, 180, 210, 213, 229, 252, 284, 315, 355, 420, 426, 458, 497, 630, 639, 687, 710, 852, 916, 994, 1065, 1145, 1260, 1278, 1374, 1420, 1491, 1603, 1988, 2061, 2130, 2290, 2485, 2556, 2748, 2982, 3195, 3206, 3435, 4122, 4260, 4473, 4580, 4809, 4970, 5964, 6390, 6412, 6870, 7455, 8015, 8244, 8946, 9618, 9940, 10305, 12780, 13740, 14427, 14910, 16030, 16259, 17892, 19236, 20610, 22365, 24045, 28854, 29820, 32060, 32518, 41220, 44730, 48090, 48777, 57708, 65036, 72135, 81295, 89460, 96180, 97554, 113813, 144270, 146331, 162590, 195108, 227626, 243885, 288540, 292662, 325180, 341439, 455252, 487770, 569065, 585324, 682878, 731655, 975540, 1024317, 1138130, 1365756, 1463310, 1707195, 2048634, 2276260, 2926620, 3414390, 4097268, 5121585, 6828780, 10243170, 20486340]

約数ペア:

[(1, 20486340), (2, 10243170), (3, 6828780), (4, 5121585), (5, 4097268), (6, 3414390), (7, 2926620), (9, 2276260), (10, 2048634), (12, 1707195), (14, 1463310), (15, 1365756), (18, 1138130), (20, 1024317), (21, 975540), (28, 731655), (30, 682878), (35, 585324), (36, 569065), (42, 487770), (45, 455252), (60, 341439), (63, 325180), (70, 292662), (71, 288540), (84, 243885), (90, 227626), (105, 195108), (126, 162590), (140, 146331), (142, 144270), (180, 113813), (210, 97554), (213, 96180), (229, 89460), (252, 81295), (284, 72135), (315, 65036), (355, 57708), (420, 48777), (426, 48090), (458, 44730), (497, 41220), (630, 32518), (639, 32060), (687, 29820), (710, 28854), (852, 24045), (916, 22365), (994, 20610), (1065, 19236), (1145, 17892), (1260, 16259), (1278, 16030), (1374, 14910), (1420, 14427), (1491, 13740), (1603, 12780), (1988, 10305), (2061, 9940), (2130, 9618), (2290, 8946), (2485, 8244), (2556, 8015), (2748, 7455), (2982, 6870), (3195, 6412), (3206, 6390), (3435, 5964), (4122, 4970), (4260, 4809), (4473, 4580)]