21839320

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{281}}^1$

素因数の和:388

約数の個数: 64

約数和(自身を含む): 51775200

約数和(自身を除く): 29935880

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 67, 116, 134, 145, 232, 268, 281, 290, 335, 536, 562, 580, 670, 1124, 1160, 1340, 1405, 1943, 2248, 2680, 2810, 3886, 5620, 7772, 8149, 9715, 11240, 15544, 16298, 18827, 19430, 32596, 37654, 38860, 40745, 65192, 75308, 77720, 81490, 94135, 150616, 162980, 188270, 325960, 376540, 545983, 753080, 1091966, 2183932, 2729915, 4367864, 5459830, 10919660, 21839320]

約数ペア:

[(1, 21839320), (2, 10919660), (4, 5459830), (5, 4367864), (8, 2729915), (10, 2183932), (20, 1091966), (29, 753080), (40, 545983), (58, 376540), (67, 325960), (116, 188270), (134, 162980), (145, 150616), (232, 94135), (268, 81490), (281, 77720), (290, 75308), (335, 65192), (536, 40745), (562, 38860), (580, 37654), (670, 32596), (1124, 19430), (1160, 18827), (1340, 16298), (1405, 15544), (1943, 11240), (2248, 9715), (2680, 8149), (2810, 7772), (3886, 5620)]