21918640

素因数分解:

$2^4\times 5^1\times {\mathrm{83}}^1\times {\mathrm{3301}}^1$

素因数の和:3397

約数の個数: 40

約数和(自身を含む): 51590448

約数和(自身を除く): 29671808

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 83, 166, 332, 415, 664, 830, 1328, 1660, 3301, 3320, 6602, 6640, 13204, 16505, 26408, 33010, 52816, 66020, 132040, 264080, 273983, 547966, 1095932, 1369915, 2191864, 2739830, 4383728, 5479660, 10959320, 21918640]

約数ペア:

[(1, 21918640), (2, 10959320), (4, 5479660), (5, 4383728), (8, 2739830), (10, 2191864), (16, 1369915), (20, 1095932), (40, 547966), (80, 273983), (83, 264080), (166, 132040), (332, 66020), (415, 52816), (664, 33010), (830, 26408), (1328, 16505), (1660, 13204), (3301, 6640), (3320, 6602)]