20789840

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{101}}^1$

素因数の和:228

約数の個数: 80

約数和(自身を含む): 50996736

約数和(自身を除く): 30206896

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 83, 101, 124, 155, 166, 202, 248, 310, 332, 404, 415, 496, 505, 620, 664, 808, 830, 1010, 1240, 1328, 1616, 1660, 2020, 2480, 2573, 3131, 3320, 4040, 5146, 6262, 6640, 8080, 8383, 10292, 12524, 12865, 15655, 16766, 20584, 25048, 25730, 31310, 33532, 41168, 41915, 50096, 51460, 62620, 67064, 83830, 102920, 125240, 134128, 167660, 205840, 250480, 259873, 335320, 519746, 670640, 1039492, 1299365, 2078984, 2598730, 4157968, 5197460, 10394920, 20789840]

約数ペア:

[(1, 20789840), (2, 10394920), (4, 5197460), (5, 4157968), (8, 2598730), (10, 2078984), (16, 1299365), (20, 1039492), (31, 670640), (40, 519746), (62, 335320), (80, 259873), (83, 250480), (101, 205840), (124, 167660), (155, 134128), (166, 125240), (202, 102920), (248, 83830), (310, 67064), (332, 62620), (404, 51460), (415, 50096), (496, 41915), (505, 41168), (620, 33532), (664, 31310), (808, 25730), (830, 25048), (1010, 20584), (1240, 16766), (1328, 15655), (1616, 12865), (1660, 12524), (2020, 10292), (2480, 8383), (2573, 8080), (3131, 6640), (3320, 6262), (4040, 5146)]