21970720

素因数分解:

$2^5\times 5^1\times {\mathrm{353}}^1\times {\mathrm{389}}^1$

素因数の和:757

約数の個数: 48

約数和(自身を含む): 52186680

約数和(自身を除く): 30215960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 353, 389, 706, 778, 1412, 1556, 1765, 1945, 2824, 3112, 3530, 3890, 5648, 6224, 7060, 7780, 11296, 12448, 14120, 15560, 28240, 31120, 56480, 62240, 137317, 274634, 549268, 686585, 1098536, 1373170, 2197072, 2746340, 4394144, 5492680, 10985360, 21970720]

約数ペア:

[(1, 21970720), (2, 10985360), (4, 5492680), (5, 4394144), (8, 2746340), (10, 2197072), (16, 1373170), (20, 1098536), (32, 686585), (40, 549268), (80, 274634), (160, 137317), (353, 62240), (389, 56480), (706, 31120), (778, 28240), (1412, 15560), (1556, 14120), (1765, 12448), (1945, 11296), (2824, 7780), (3112, 7060), (3530, 6224), (3890, 5648)]