21780304

素因数分解:

$2^4\times 7^2\times {\mathrm{13}}^1\times {\mathrm{2137}}^1$

素因数の和:2172

約数の個数: 60

約数和(自身を含む): 52889844

約数和(自身を除く): 31109540

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 49, 52, 56, 91, 98, 104, 112, 182, 196, 208, 364, 392, 637, 728, 784, 1274, 1456, 2137, 2548, 4274, 5096, 8548, 10192, 14959, 17096, 27781, 29918, 34192, 55562, 59836, 104713, 111124, 119672, 194467, 209426, 222248, 239344, 388934, 418852, 444496, 777868, 837704, 1361269, 1555736, 1675408, 2722538, 3111472, 5445076, 10890152, 21780304]

約数ペア:

[(1, 21780304), (2, 10890152), (4, 5445076), (7, 3111472), (8, 2722538), (13, 1675408), (14, 1555736), (16, 1361269), (26, 837704), (28, 777868), (49, 444496), (52, 418852), (56, 388934), (91, 239344), (98, 222248), (104, 209426), (112, 194467), (182, 119672), (196, 111124), (208, 104713), (364, 59836), (392, 55562), (637, 34192), (728, 29918), (784, 27781), (1274, 17096), (1456, 14959), (2137, 10192), (2548, 8548), (4274, 5096)]