21004487995

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1\times {\mathrm{229}}^1\times {\mathrm{2357}}^1$

素因数の和:2815

約数の個数: 32

約数和(自身を含む): 26058352320

約数和(自身を除く): 5053864325

約数列:

[1, 5, 43, 181, 215, 229, 905, 1145, 2357, 7783, 9847, 11785, 38915, 41449, 49235, 101351, 207245, 426617, 506755, 539753, 1782307, 2133085, 2698765, 8911535, 18344531, 23209379, 91722655, 97695293, 116046895, 488476465, 4200897599, 21004487995]

約数ペア:

[(1, 21004487995), (5, 4200897599), (43, 488476465), (181, 116046895), (215, 97695293), (229, 91722655), (905, 23209379), (1145, 18344531), (2357, 8911535), (7783, 2698765), (9847, 2133085), (11785, 1782307), (38915, 539753), (41449, 506755), (49235, 426617), (101351, 207245)]