28403440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{881}}^1$

素因数の和:938

約数の個数: 80

約数和(自身を含む): 73495296

約数和(自身を除く): 45091856

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 620, 806, 881, 1040, 1240, 1612, 1762, 2015, 2480, 3224, 3524, 4030, 4405, 6448, 7048, 8060, 8810, 11453, 14096, 16120, 17620, 22906, 27311, 32240, 35240, 45812, 54622, 57265, 70480, 91624, 109244, 114530, 136555, 183248, 218488, 229060, 273110, 355043, 436976, 458120, 546220, 710086, 916240, 1092440, 1420172, 1775215, 2184880, 2840344, 3550430, 5680688, 7100860, 14201720, 28403440]

約数ペア:

[(1, 28403440), (2, 14201720), (4, 7100860), (5, 5680688), (8, 3550430), (10, 2840344), (13, 2184880), (16, 1775215), (20, 1420172), (26, 1092440), (31, 916240), (40, 710086), (52, 546220), (62, 458120), (65, 436976), (80, 355043), (104, 273110), (124, 229060), (130, 218488), (155, 183248), (208, 136555), (248, 114530), (260, 109244), (310, 91624), (403, 70480), (496, 57265), (520, 54622), (620, 45812), (806, 35240), (881, 32240), (1040, 27311), (1240, 22906), (1612, 17620), (1762, 16120), (2015, 14096), (2480, 11453), (3224, 8810), (3524, 8060), (4030, 7048), (4405, 6448)]