21215556

素因数分解:

$2^2\times 3^2\times {\mathrm{61}}^1\times {\mathrm{9661}}^1$

素因数の和:9732

約数の個数: 36

約数和(自身を含む): 54513004

約数和(自身を除く): 33297448

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 61, 122, 183, 244, 366, 549, 732, 1098, 2196, 9661, 19322, 28983, 38644, 57966, 86949, 115932, 173898, 347796, 589321, 1178642, 1767963, 2357284, 3535926, 5303889, 7071852, 10607778, 21215556]

約数ペア:

[(1, 21215556), (2, 10607778), (3, 7071852), (4, 5303889), (6, 3535926), (9, 2357284), (12, 1767963), (18, 1178642), (36, 589321), (61, 347796), (122, 173898), (183, 115932), (244, 86949), (366, 57966), (549, 38644), (732, 28983), (1098, 19322), (2196, 9661)]