21714980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1423}}^1$

素因数の和:1548

約数の個数: 48

約数和(自身を含む): 52631040

約数和(自身を除く): 30916060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 109, 140, 218, 436, 545, 763, 1090, 1423, 1526, 2180, 2846, 3052, 3815, 5692, 7115, 7630, 9961, 14230, 15260, 19922, 28460, 39844, 49805, 99610, 155107, 199220, 310214, 620428, 775535, 1085749, 1551070, 2171498, 3102140, 4342996, 5428745, 10857490, 21714980]

約数ペア:

[(1, 21714980), (2, 10857490), (4, 5428745), (5, 4342996), (7, 3102140), (10, 2171498), (14, 1551070), (20, 1085749), (28, 775535), (35, 620428), (70, 310214), (109, 199220), (140, 155107), (218, 99610), (436, 49805), (545, 39844), (763, 28460), (1090, 19922), (1423, 15260), (1526, 14230), (2180, 9961), (2846, 7630), (3052, 7115), (3815, 5692)]