77891840

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1$

素因数の和:216

約数の個数: 144

約数和(自身を含む): 208782336

約数和(自身を除く): 130890496

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 52, 62, 64, 65, 80, 104, 124, 128, 130, 151, 155, 160, 208, 248, 256, 260, 302, 310, 320, 403, 416, 496, 520, 604, 620, 640, 755, 806, 832, 992, 1040, 1208, 1240, 1280, 1510, 1612, 1664, 1963, 1984, 2015, 2080, 2416, 2480, 3020, 3224, 3328, 3926, 3968, 4030, 4160, 4681, 4832, 4960, 6040, 6448, 7852, 7936, 8060, 8320, 9362, 9664, 9815, 9920, 12080, 12896, 15704, 16120, 16640, 18724, 19328, 19630, 19840, 23405, 24160, 25792, 31408, 32240, 37448, 38656, 39260, 39680, 46810, 48320, 51584, 60853, 62816, 64480, 74896, 78520, 93620, 96640, 103168, 121706, 125632, 128960, 149792, 157040, 187240, 193280, 243412, 251264, 257920, 299584, 304265, 314080, 374480, 486824, 502528, 515840, 599168, 608530, 628160, 748960, 973648, 1198336, 1217060, 1256320, 1497920, 1947296, 2434120, 2512640, 2995840, 3894592, 4868240, 5991680, 7789184, 9736480, 15578368, 19472960, 38945920, 77891840]

約数ペア:

[(1, 77891840), (2, 38945920), (4, 19472960), (5, 15578368), (8, 9736480), (10, 7789184), (13, 5991680), (16, 4868240), (20, 3894592), (26, 2995840), (31, 2512640), (32, 2434120), (40, 1947296), (52, 1497920), (62, 1256320), (64, 1217060), (65, 1198336), (80, 973648), (104, 748960), (124, 628160), (128, 608530), (130, 599168), (151, 515840), (155, 502528), (160, 486824), (208, 374480), (248, 314080), (256, 304265), (260, 299584), (302, 257920), (310, 251264), (320, 243412), (403, 193280), (416, 187240), (496, 157040), (520, 149792), (604, 128960), (620, 125632), (640, 121706), (755, 103168), (806, 96640), (832, 93620), (992, 78520), (1040, 74896), (1208, 64480), (1240, 62816), (1280, 60853), (1510, 51584), (1612, 48320), (1664, 46810), (1963, 39680), (1984, 39260), (2015, 38656), (2080, 37448), (2416, 32240), (2480, 31408), (3020, 25792), (3224, 24160), (3328, 23405), (3926, 19840), (3968, 19630), (4030, 19328), (4160, 18724), (4681, 16640), (4832, 16120), (4960, 15704), (6040, 12896), (6448, 12080), (7852, 9920), (7936, 9815), (8060, 9664), (8320, 9362)]