81340280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{9371}}^1$

素因数の和:9420

約数の個数: 64

約数和(自身を含む): 215930880

約数和(自身を除く): 134590600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 4340, 8680, 9371, 18742, 37484, 46855, 65597, 74968, 93710, 131194, 187420, 262388, 290501, 327985, 374840, 524776, 581002, 655970, 1162004, 1311940, 1452505, 2033507, 2324008, 2623880, 2905010, 4067014, 5810020, 8134028, 10167535, 11620040, 16268056, 20335070, 40670140, 81340280]

約数ペア:

[(1, 81340280), (2, 40670140), (4, 20335070), (5, 16268056), (7, 11620040), (8, 10167535), (10, 8134028), (14, 5810020), (20, 4067014), (28, 2905010), (31, 2623880), (35, 2324008), (40, 2033507), (56, 1452505), (62, 1311940), (70, 1162004), (124, 655970), (140, 581002), (155, 524776), (217, 374840), (248, 327985), (280, 290501), (310, 262388), (434, 187420), (620, 131194), (868, 93710), (1085, 74968), (1240, 65597), (1736, 46855), (2170, 37484), (4340, 18742), (8680, 9371)]