21396040

素因数分解:

$2^3\times 5^1\times {\mathrm{167}}^1\times {\mathrm{3203}}^1$

素因数の和:3381

約数の個数: 32

約数和(自身を含む): 48444480

約数和(自身を除く): 27048440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 167, 334, 668, 835, 1336, 1670, 3203, 3340, 6406, 6680, 12812, 16015, 25624, 32030, 64060, 128120, 534901, 1069802, 2139604, 2674505, 4279208, 5349010, 10698020, 21396040]

約数ペア:

[(1, 21396040), (2, 10698020), (4, 5349010), (5, 4279208), (8, 2674505), (10, 2139604), (20, 1069802), (40, 534901), (167, 128120), (334, 64060), (668, 32030), (835, 25624), (1336, 16015), (1670, 12812), (3203, 6680), (3340, 6406)]