21390

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1$

素因数の和:64

約数の個数: 32

約数和(自身を含む): 55296

約数和(自身を除く): 33906

約数列:

[1, 2, 3, 5, 6, 10, 15, 23, 30, 31, 46, 62, 69, 93, 115, 138, 155, 186, 230, 310, 345, 465, 690, 713, 930, 1426, 2139, 3565, 4278, 7130, 10695, 21390]

約数ペア:

[(1, 21390), (2, 10695), (3, 7130), (5, 4278), (6, 3565), (10, 2139), (15, 1426), (23, 930), (30, 713), (31, 690), (46, 465), (62, 345), (69, 310), (93, 230), (115, 186), (138, 155)]