21327440

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{173}}^1$

素因数の和:276

約数の個数: 80

約数和(自身を含む): 52818048

約数和(自身を除く): 31490608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 67, 80, 92, 115, 134, 173, 184, 230, 268, 335, 346, 368, 460, 536, 670, 692, 865, 920, 1072, 1340, 1384, 1541, 1730, 1840, 2680, 2768, 3082, 3460, 3979, 5360, 6164, 6920, 7705, 7958, 11591, 12328, 13840, 15410, 15916, 19895, 23182, 24656, 30820, 31832, 39790, 46364, 57955, 61640, 63664, 79580, 92728, 115910, 123280, 159160, 185456, 231820, 266593, 318320, 463640, 533186, 927280, 1066372, 1332965, 2132744, 2665930, 4265488, 5331860, 10663720, 21327440]

約数ペア:

[(1, 21327440), (2, 10663720), (4, 5331860), (5, 4265488), (8, 2665930), (10, 2132744), (16, 1332965), (20, 1066372), (23, 927280), (40, 533186), (46, 463640), (67, 318320), (80, 266593), (92, 231820), (115, 185456), (134, 159160), (173, 123280), (184, 115910), (230, 92728), (268, 79580), (335, 63664), (346, 61640), (368, 57955), (460, 46364), (536, 39790), (670, 31832), (692, 30820), (865, 24656), (920, 23182), (1072, 19895), (1340, 15916), (1384, 15410), (1541, 13840), (1730, 12328), (1840, 11591), (2680, 7958), (2768, 7705), (3082, 6920), (3460, 6164), (3979, 5360)]