81397620

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5081}}^1$

素因数の和:5185

約数の個数: 72

約数和(自身を含む): 249729480

約数和(自身を除く): 168331860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 89, 90, 178, 180, 267, 356, 445, 534, 801, 890, 1068, 1335, 1602, 1780, 2670, 3204, 4005, 5081, 5340, 8010, 10162, 15243, 16020, 20324, 25405, 30486, 45729, 50810, 60972, 76215, 91458, 101620, 152430, 182916, 228645, 304860, 452209, 457290, 904418, 914580, 1356627, 1808836, 2261045, 2713254, 4069881, 4522090, 5426508, 6783135, 8139762, 9044180, 13566270, 16279524, 20349405, 27132540, 40698810, 81397620]

約数ペア:

[(1, 81397620), (2, 40698810), (3, 27132540), (4, 20349405), (5, 16279524), (6, 13566270), (9, 9044180), (10, 8139762), (12, 6783135), (15, 5426508), (18, 4522090), (20, 4069881), (30, 2713254), (36, 2261045), (45, 1808836), (60, 1356627), (89, 914580), (90, 904418), (178, 457290), (180, 452209), (267, 304860), (356, 228645), (445, 182916), (534, 152430), (801, 101620), (890, 91458), (1068, 76215), (1335, 60972), (1602, 50810), (1780, 45729), (2670, 30486), (3204, 25405), (4005, 20324), (5081, 16020), (5340, 15243), (8010, 10162)]