21990650

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{39983}}^1$

素因数の和:40006

約数の個数: 24

約数和(自身を含む): 44622144

約数和(自身を除く): 22631494

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 275, 550, 39983, 79966, 199915, 399830, 439813, 879626, 999575, 1999150, 2199065, 4398130, 10995325, 21990650]

約数ペア:

[(1, 21990650), (2, 10995325), (5, 4398130), (10, 2199065), (11, 1999150), (22, 999575), (25, 879626), (50, 439813), (55, 399830), (110, 199915), (275, 79966), (550, 39983)]