1996451720

素因数分解:

$2^3\times 5^1\times {\mathrm{181}}^1\times {\mathrm{313}}^1\times {\mathrm{881}}^1$

素因数の和:1386

約数の個数: 64

約数和(自身を含む): 4536408240

約数和(自身を除く): 2539956520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 181, 313, 362, 626, 724, 881, 905, 1252, 1448, 1565, 1762, 1810, 2504, 3130, 3524, 3620, 4405, 6260, 7048, 7240, 8810, 12520, 17620, 35240, 56653, 113306, 159461, 226612, 275753, 283265, 318922, 453224, 551506, 566530, 637844, 797305, 1103012, 1133060, 1275688, 1378765, 1594610, 2206024, 2266120, 2757530, 3189220, 5515060, 6378440, 11030120, 49911293, 99822586, 199645172, 249556465, 399290344, 499112930, 998225860, 1996451720]

約数ペア:

[(1, 1996451720), (2, 998225860), (4, 499112930), (5, 399290344), (8, 249556465), (10, 199645172), (20, 99822586), (40, 49911293), (181, 11030120), (313, 6378440), (362, 5515060), (626, 3189220), (724, 2757530), (881, 2266120), (905, 2206024), (1252, 1594610), (1448, 1378765), (1565, 1275688), (1762, 1133060), (1810, 1103012), (2504, 797305), (3130, 637844), (3524, 566530), (3620, 551506), (4405, 453224), (6260, 318922), (7048, 283265), (7240, 275753), (8810, 226612), (12520, 159461), (17620, 113306), (35240, 56653)]