208921720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{227}}^1$

素因数の和:437

約数の個数: 128

約数和(自身を含む): 571276800

約数和(自身を除く): 362355080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 70, 76, 95, 133, 140, 152, 173, 190, 227, 266, 280, 346, 380, 454, 532, 665, 692, 760, 865, 908, 1064, 1135, 1211, 1330, 1384, 1589, 1730, 1816, 2270, 2422, 2660, 3178, 3287, 3460, 4313, 4540, 4844, 5320, 6055, 6356, 6574, 6920, 7945, 8626, 9080, 9688, 12110, 12712, 13148, 15890, 16435, 17252, 21565, 23009, 24220, 26296, 30191, 31780, 32870, 34504, 39271, 43130, 46018, 48440, 60382, 63560, 65740, 78542, 86260, 92036, 115045, 120764, 131480, 150955, 157084, 172520, 184072, 196355, 230090, 241528, 274897, 301910, 314168, 392710, 460180, 549794, 603820, 746149, 785420, 920360, 1099588, 1207640, 1374485, 1492298, 1570840, 2199176, 2748970, 2984596, 3730745, 5223043, 5497940, 5969192, 7461490, 10446086, 10995880, 14922980, 20892172, 26115215, 29845960, 41784344, 52230430, 104460860, 208921720]

約数ペア:

[(1, 208921720), (2, 104460860), (4, 52230430), (5, 41784344), (7, 29845960), (8, 26115215), (10, 20892172), (14, 14922980), (19, 10995880), (20, 10446086), (28, 7461490), (35, 5969192), (38, 5497940), (40, 5223043), (56, 3730745), (70, 2984596), (76, 2748970), (95, 2199176), (133, 1570840), (140, 1492298), (152, 1374485), (173, 1207640), (190, 1099588), (227, 920360), (266, 785420), (280, 746149), (346, 603820), (380, 549794), (454, 460180), (532, 392710), (665, 314168), (692, 301910), (760, 274897), (865, 241528), (908, 230090), (1064, 196355), (1135, 184072), (1211, 172520), (1330, 157084), (1384, 150955), (1589, 131480), (1730, 120764), (1816, 115045), (2270, 92036), (2422, 86260), (2660, 78542), (3178, 65740), (3287, 63560), (3460, 60382), (4313, 48440), (4540, 46018), (4844, 43130), (5320, 39271), (6055, 34504), (6356, 32870), (6574, 31780), (6920, 30191), (7945, 26296), (8626, 24220), (9080, 23009), (9688, 21565), (12110, 17252), (12712, 16435), (13148, 15890)]