251101240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{421}}^1$

素因数の和:513

約数の個数: 128

約数和(自身を含む): 646571520

約数和(自身を除く): 395470280

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 37, 40, 52, 62, 65, 74, 104, 124, 130, 148, 155, 185, 248, 260, 296, 310, 370, 403, 421, 481, 520, 620, 740, 806, 842, 962, 1147, 1240, 1480, 1612, 1684, 1924, 2015, 2105, 2294, 2405, 3224, 3368, 3848, 4030, 4210, 4588, 4810, 5473, 5735, 8060, 8420, 9176, 9620, 10946, 11470, 13051, 14911, 15577, 16120, 16840, 19240, 21892, 22940, 26102, 27365, 29822, 31154, 43784, 45880, 52204, 54730, 59644, 62308, 65255, 74555, 77885, 104408, 109460, 119288, 124616, 130510, 149110, 155770, 169663, 202501, 218920, 261020, 298220, 311540, 339326, 405002, 482887, 522040, 596440, 623080, 678652, 810004, 848315, 965774, 1012505, 1357304, 1620008, 1696630, 1931548, 2025010, 2414435, 3393260, 3863096, 4050020, 4828870, 6277531, 6786520, 8100040, 9657740, 12555062, 19315480, 25110124, 31387655, 50220248, 62775310, 125550620, 251101240]

約数ペア:

[(1, 251101240), (2, 125550620), (4, 62775310), (5, 50220248), (8, 31387655), (10, 25110124), (13, 19315480), (20, 12555062), (26, 9657740), (31, 8100040), (37, 6786520), (40, 6277531), (52, 4828870), (62, 4050020), (65, 3863096), (74, 3393260), (104, 2414435), (124, 2025010), (130, 1931548), (148, 1696630), (155, 1620008), (185, 1357304), (248, 1012505), (260, 965774), (296, 848315), (310, 810004), (370, 678652), (403, 623080), (421, 596440), (481, 522040), (520, 482887), (620, 405002), (740, 339326), (806, 311540), (842, 298220), (962, 261020), (1147, 218920), (1240, 202501), (1480, 169663), (1612, 155770), (1684, 149110), (1924, 130510), (2015, 124616), (2105, 119288), (2294, 109460), (2405, 104408), (3224, 77885), (3368, 74555), (3848, 65255), (4030, 62308), (4210, 59644), (4588, 54730), (4810, 52204), (5473, 45880), (5735, 43784), (8060, 31154), (8420, 29822), (9176, 27365), (9620, 26102), (10946, 22940), (11470, 21892), (13051, 19240), (14911, 16840), (15577, 16120)]