20372480

素因数分解:

$2^{10}\times 5^1\times {\mathrm{23}}^1\times {\mathrm{173}}^1$

素因数の和:221

約数の個数: 88

約数和(自身を含む): 51289632

約数和(自身を除く): 30917152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 160, 173, 184, 230, 256, 320, 346, 368, 460, 512, 640, 692, 736, 865, 920, 1024, 1280, 1384, 1472, 1730, 1840, 2560, 2768, 2944, 3460, 3680, 3979, 5120, 5536, 5888, 6920, 7360, 7958, 11072, 11776, 13840, 14720, 15916, 19895, 22144, 23552, 27680, 29440, 31832, 39790, 44288, 55360, 58880, 63664, 79580, 88576, 110720, 117760, 127328, 159160, 177152, 221440, 254656, 318320, 442880, 509312, 636640, 885760, 1018624, 1273280, 2037248, 2546560, 4074496, 5093120, 10186240, 20372480]

約数ペア:

[(1, 20372480), (2, 10186240), (4, 5093120), (5, 4074496), (8, 2546560), (10, 2037248), (16, 1273280), (20, 1018624), (23, 885760), (32, 636640), (40, 509312), (46, 442880), (64, 318320), (80, 254656), (92, 221440), (115, 177152), (128, 159160), (160, 127328), (173, 117760), (184, 110720), (230, 88576), (256, 79580), (320, 63664), (346, 58880), (368, 55360), (460, 44288), (512, 39790), (640, 31832), (692, 29440), (736, 27680), (865, 23552), (920, 22144), (1024, 19895), (1280, 15916), (1384, 14720), (1472, 13840), (1730, 11776), (1840, 11072), (2560, 7958), (2768, 7360), (2944, 6920), (3460, 5888), (3680, 5536), (3979, 5120)]