81415360

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19571}}^1$

素因数の和:19601

約数の個数: 56

約数和(自身を含む): 208794096

約数和(自身を除く): 127378736

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 19571, 39142, 78284, 97855, 156568, 195710, 254423, 313136, 391420, 508846, 626272, 782840, 1017692, 1252544, 1272115, 1565680, 2035384, 2544230, 3131360, 4070768, 5088460, 6262720, 8141536, 10176920, 16283072, 20353840, 40707680, 81415360]

約数ペア:

[(1, 81415360), (2, 40707680), (4, 20353840), (5, 16283072), (8, 10176920), (10, 8141536), (13, 6262720), (16, 5088460), (20, 4070768), (26, 3131360), (32, 2544230), (40, 2035384), (52, 1565680), (64, 1272115), (65, 1252544), (80, 1017692), (104, 782840), (130, 626272), (160, 508846), (208, 391420), (260, 313136), (320, 254423), (416, 195710), (520, 156568), (832, 97855), (1040, 78284), (2080, 39142), (4160, 19571)]