28709720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{137}}^1$

素因数の和:205

約数の個数: 96

約数和(自身を含む): 72731520

約数和(自身を除く): 44021800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 137, 155, 169, 248, 260, 274, 310, 338, 403, 520, 548, 620, 676, 685, 806, 845, 1096, 1240, 1352, 1370, 1612, 1690, 1781, 2015, 2740, 3224, 3380, 3562, 4030, 4247, 5239, 5480, 6760, 7124, 8060, 8494, 8905, 10478, 14248, 16120, 16988, 17810, 20956, 21235, 23153, 26195, 33976, 35620, 41912, 42470, 46306, 52390, 55211, 71240, 84940, 92612, 104780, 110422, 115765, 169880, 185224, 209560, 220844, 231530, 276055, 441688, 463060, 552110, 717743, 926120, 1104220, 1435486, 2208440, 2870972, 3588715, 5741944, 7177430, 14354860, 28709720]

約数ペア:

[(1, 28709720), (2, 14354860), (4, 7177430), (5, 5741944), (8, 3588715), (10, 2870972), (13, 2208440), (20, 1435486), (26, 1104220), (31, 926120), (40, 717743), (52, 552110), (62, 463060), (65, 441688), (104, 276055), (124, 231530), (130, 220844), (137, 209560), (155, 185224), (169, 169880), (248, 115765), (260, 110422), (274, 104780), (310, 92612), (338, 84940), (403, 71240), (520, 55211), (548, 52390), (620, 46306), (676, 42470), (685, 41912), (806, 35620), (845, 33976), (1096, 26195), (1240, 23153), (1352, 21235), (1370, 20956), (1612, 17810), (1690, 16988), (1781, 16120), (2015, 14248), (2740, 10478), (3224, 8905), (3380, 8494), (3562, 8060), (4030, 7124), (4247, 6760), (5239, 5480)]