81440720

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{32839}}^1$

素因数の和:32883

約数の個数: 40

約数和(自身を含む): 195463680

約数和(自身を除く): 114022960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 32839, 65678, 131356, 164195, 262712, 328390, 525424, 656780, 1018009, 1313560, 2036018, 2627120, 4072036, 5090045, 8144072, 10180090, 16288144, 20360180, 40720360, 81440720]

約数ペア:

[(1, 81440720), (2, 40720360), (4, 20360180), (5, 16288144), (8, 10180090), (10, 8144072), (16, 5090045), (20, 4072036), (31, 2627120), (40, 2036018), (62, 1313560), (80, 1018009), (124, 656780), (155, 525424), (248, 328390), (310, 262712), (496, 164195), (620, 131356), (1240, 65678), (2480, 32839)]