21780180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{121001}}^1$

素因数の和:121016

約数の個数: 36

約数和(自身を含む): 66067092

約数和(自身を除く): 44286912

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 121001, 242002, 363003, 484004, 605005, 726006, 1089009, 1210010, 1452012, 1815015, 2178018, 2420020, 3630030, 4356036, 5445045, 7260060, 10890090, 21780180]

約数ペア:

[(1, 21780180), (2, 10890090), (3, 7260060), (4, 5445045), (5, 4356036), (6, 3630030), (9, 2420020), (10, 2178018), (12, 1815015), (15, 1452012), (18, 1210010), (20, 1089009), (30, 726006), (36, 605005), (45, 484004), (60, 363003), (90, 242002), (180, 121001)]