21283395

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{1259}}^1$

素因数の和:1304

約数の個数: 48

約数和(自身を含む): 41368320

約数和(自身を除く): 20084925

約数列:

[1, 3, 5, 7, 15, 21, 23, 35, 49, 69, 105, 115, 147, 161, 245, 345, 483, 735, 805, 1127, 1259, 2415, 3381, 3777, 5635, 6295, 8813, 16905, 18885, 26439, 28957, 44065, 61691, 86871, 132195, 144785, 185073, 202699, 308455, 434355, 608097, 925365, 1013495, 1418893, 3040485, 4256679, 7094465, 21283395]

約数ペア:

[(1, 21283395), (3, 7094465), (5, 4256679), (7, 3040485), (15, 1418893), (21, 1013495), (23, 925365), (35, 608097), (49, 434355), (69, 308455), (105, 202699), (115, 185073), (147, 144785), (161, 132195), (245, 86871), (345, 61691), (483, 44065), (735, 28957), (805, 26439), (1127, 18885), (1259, 16905), (2415, 8813), (3381, 6295), (3777, 5635)]