19902003268

素因数分解:

$2^2\times 7^2\times {\mathrm{79}}^1\times {\mathrm{991}}^1\times {\mathrm{1297}}^1$

素因数の和:2385

約数の個数: 72

約数和(自身を含む): 41100702720

約数和(自身を除く): 21198699452

約数列:

[1, 2, 4, 7, 14, 28, 49, 79, 98, 158, 196, 316, 553, 991, 1106, 1297, 1982, 2212, 2594, 3871, 3964, 5188, 6937, 7742, 9079, 13874, 15484, 18158, 27748, 36316, 48559, 63553, 78289, 97118, 102463, 127106, 156578, 194236, 204926, 254212, 313156, 409852, 548023, 717241, 1096046, 1285327, 1434482, 2192092, 2570654, 2868964, 3836161, 5020687, 5141308, 7672322, 8997289, 10041374, 15344644, 17994578, 20082748, 35989156, 62981023, 101540833, 125962046, 203081666, 251924092, 406163332, 710785831, 1421571662, 2843143324, 4975500817, 9951001634, 19902003268]

約数ペア:

[(1, 19902003268), (2, 9951001634), (4, 4975500817), (7, 2843143324), (14, 1421571662), (28, 710785831), (49, 406163332), (79, 251924092), (98, 203081666), (158, 125962046), (196, 101540833), (316, 62981023), (553, 35989156), (991, 20082748), (1106, 17994578), (1297, 15344644), (1982, 10041374), (2212, 8997289), (2594, 7672322), (3871, 5141308), (3964, 5020687), (5188, 3836161), (6937, 2868964), (7742, 2570654), (9079, 2192092), (13874, 1434482), (15484, 1285327), (18158, 1096046), (27748, 717241), (36316, 548023), (48559, 409852), (63553, 313156), (78289, 254212), (97118, 204926), (102463, 194236), (127106, 156578)]