131286640

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{26903}}^1$

素因数の和:26977

約数の個数: 40

約数和(自身を含む): 310256928

約数和(自身を除く): 178970288

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4880, 26903, 53806, 107612, 134515, 215224, 269030, 430448, 538060, 1076120, 1641083, 2152240, 3282166, 6564332, 8205415, 13128664, 16410830, 26257328, 32821660, 65643320, 131286640]

約数ペア:

[(1, 131286640), (2, 65643320), (4, 32821660), (5, 26257328), (8, 16410830), (10, 13128664), (16, 8205415), (20, 6564332), (40, 3282166), (61, 2152240), (80, 1641083), (122, 1076120), (244, 538060), (305, 430448), (488, 269030), (610, 215224), (976, 134515), (1220, 107612), (2440, 53806), (4880, 26903)]