19803780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{409}}^1$

素因数の和:693

約数の個数: 72

約数和(自身を含む): 60442200

約数和(自身を除く): 40638420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 269, 409, 538, 807, 818, 1076, 1227, 1345, 1614, 1636, 2045, 2421, 2454, 2690, 3228, 3681, 4035, 4090, 4842, 4908, 5380, 6135, 7362, 8070, 8180, 9684, 12105, 12270, 14724, 16140, 18405, 24210, 24540, 36810, 48420, 73620, 110021, 220042, 330063, 440084, 550105, 660126, 990189, 1100210, 1320252, 1650315, 1980378, 2200420, 3300630, 3960756, 4950945, 6601260, 9901890, 19803780]

約数ペア:

[(1, 19803780), (2, 9901890), (3, 6601260), (4, 4950945), (5, 3960756), (6, 3300630), (9, 2200420), (10, 1980378), (12, 1650315), (15, 1320252), (18, 1100210), (20, 990189), (30, 660126), (36, 550105), (45, 440084), (60, 330063), (90, 220042), (180, 110021), (269, 73620), (409, 48420), (538, 36810), (807, 24540), (818, 24210), (1076, 18405), (1227, 16140), (1345, 14724), (1614, 12270), (1636, 12105), (2045, 9684), (2421, 8180), (2454, 8070), (2690, 7362), (3228, 6135), (3681, 5380), (4035, 4908), (4090, 4842)]