20218528

素因数分解:

$2^5\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{809}}^1$

素因数の和:901

約数の個数: 48

約数和(自身を含む): 44089920

約数和(自身を除く): 23871392

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 44, 71, 88, 142, 176, 284, 352, 568, 781, 809, 1136, 1562, 1618, 2272, 3124, 3236, 6248, 6472, 8899, 12496, 12944, 17798, 24992, 25888, 35596, 57439, 71192, 114878, 142384, 229756, 284768, 459512, 631829, 919024, 1263658, 1838048, 2527316, 5054632, 10109264, 20218528]

約数ペア:

[(1, 20218528), (2, 10109264), (4, 5054632), (8, 2527316), (11, 1838048), (16, 1263658), (22, 919024), (32, 631829), (44, 459512), (71, 284768), (88, 229756), (142, 142384), (176, 114878), (284, 71192), (352, 57439), (568, 35596), (781, 25888), (809, 24992), (1136, 17798), (1562, 12944), (1618, 12496), (2272, 8899), (3124, 6472), (3236, 6248)]