21940280

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{6163}}^1$

素因数の和:6263

約数の個数: 32

約数和(自身を含む): 49928400

約数和(自身を除く): 27988120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 6163, 12326, 24652, 30815, 49304, 61630, 123260, 246520, 548507, 1097014, 2194028, 2742535, 4388056, 5485070, 10970140, 21940280]

約数ペア:

[(1, 21940280), (2, 10970140), (4, 5485070), (5, 4388056), (8, 2742535), (10, 2194028), (20, 1097014), (40, 548507), (89, 246520), (178, 123260), (356, 61630), (445, 49304), (712, 30815), (890, 24652), (1780, 12326), (3560, 6163)]