20961136

素因数分解:

$2^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:242

約数の個数: 80

約数和(自身を含む): 50086080

約数和(自身を除く): 29124944

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 56, 68, 101, 109, 112, 119, 136, 202, 218, 238, 272, 404, 436, 476, 707, 763, 808, 872, 952, 1414, 1526, 1616, 1717, 1744, 1853, 1904, 2828, 3052, 3434, 3706, 5656, 6104, 6868, 7412, 11009, 11312, 12019, 12208, 12971, 13736, 14824, 22018, 24038, 25942, 27472, 29648, 44036, 48076, 51884, 77063, 88072, 96152, 103768, 154126, 176144, 187153, 192304, 207536, 308252, 374306, 616504, 748612, 1233008, 1310071, 1497224, 2620142, 2994448, 5240284, 10480568, 20961136]

約数ペア:

[(1, 20961136), (2, 10480568), (4, 5240284), (7, 2994448), (8, 2620142), (14, 1497224), (16, 1310071), (17, 1233008), (28, 748612), (34, 616504), (56, 374306), (68, 308252), (101, 207536), (109, 192304), (112, 187153), (119, 176144), (136, 154126), (202, 103768), (218, 96152), (238, 88072), (272, 77063), (404, 51884), (436, 48076), (476, 44036), (707, 29648), (763, 27472), (808, 25942), (872, 24038), (952, 22018), (1414, 14824), (1526, 13736), (1616, 12971), (1717, 12208), (1744, 12019), (1853, 11312), (1904, 11009), (2828, 7412), (3052, 6868), (3434, 6104), (3706, 5656)]