21479680

素因数分解:

$2^8\times 5^1\times {\mathrm{97}}^1\times {\mathrm{173}}^1$

素因数の和:291

約数の個数: 72

約数和(自身を含む): 52281432

約数和(自身を除く): 30801752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 97, 128, 160, 173, 194, 256, 320, 346, 388, 485, 640, 692, 776, 865, 970, 1280, 1384, 1552, 1730, 1940, 2768, 3104, 3460, 3880, 5536, 6208, 6920, 7760, 11072, 12416, 13840, 15520, 16781, 22144, 24832, 27680, 31040, 33562, 44288, 55360, 62080, 67124, 83905, 110720, 124160, 134248, 167810, 221440, 268496, 335620, 536992, 671240, 1073984, 1342480, 2147968, 2684960, 4295936, 5369920, 10739840, 21479680]

約数ペア:

[(1, 21479680), (2, 10739840), (4, 5369920), (5, 4295936), (8, 2684960), (10, 2147968), (16, 1342480), (20, 1073984), (32, 671240), (40, 536992), (64, 335620), (80, 268496), (97, 221440), (128, 167810), (160, 134248), (173, 124160), (194, 110720), (256, 83905), (320, 67124), (346, 62080), (388, 55360), (485, 44288), (640, 33562), (692, 31040), (776, 27680), (865, 24832), (970, 22144), (1280, 16781), (1384, 15520), (1552, 13840), (1730, 12416), (1940, 11072), (2768, 7760), (3104, 6920), (3460, 6208), (3880, 5536)]