21720780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{120671}}^1$

素因数の和:120686

約数の個数: 36

約数和(自身を含む): 65886912

約数和(自身を除く): 44166132

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 120671, 241342, 362013, 482684, 603355, 724026, 1086039, 1206710, 1448052, 1810065, 2172078, 2413420, 3620130, 4344156, 5430195, 7240260, 10860390, 21720780]

約数ペア:

[(1, 21720780), (2, 10860390), (3, 7240260), (4, 5430195), (5, 4344156), (6, 3620130), (9, 2413420), (10, 2172078), (12, 1810065), (15, 1448052), (18, 1206710), (20, 1086039), (30, 724026), (36, 603355), (45, 482684), (60, 362013), (90, 241342), (180, 120671)]