18723820

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 40612320

約数和(自身を除く): 21888500

約数列:

[1, 2, 4, 5, 10, 20, 67, 89, 134, 157, 178, 268, 314, 335, 356, 445, 628, 670, 785, 890, 1340, 1570, 1780, 3140, 5963, 10519, 11926, 13973, 21038, 23852, 27946, 29815, 42076, 52595, 55892, 59630, 69865, 105190, 119260, 139730, 210380, 279460, 936191, 1872382, 3744764, 4680955, 9361910, 18723820]

約数ペア:

[(1, 18723820), (2, 9361910), (4, 4680955), (5, 3744764), (10, 1872382), (20, 936191), (67, 279460), (89, 210380), (134, 139730), (157, 119260), (178, 105190), (268, 69865), (314, 59630), (335, 55892), (356, 52595), (445, 42076), (628, 29815), (670, 27946), (785, 23852), (890, 21038), (1340, 13973), (1570, 11926), (1780, 10519), (3140, 5963)]