20987178786

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{157}}^1\times {\mathrm{353641}}^1$

素因数の和:353816

約数の個数: 64

約数和(自身を含む): 53640418560

約数和(自身を除く): 32653239774

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 157, 189, 314, 378, 471, 942, 1099, 1413, 2198, 2826, 3297, 4239, 6594, 8478, 9891, 19782, 29673, 59346, 353641, 707282, 1060923, 2121846, 2475487, 3182769, 4950974, 6365538, 7426461, 9548307, 14852922, 19096614, 22279383, 44558766, 55521637, 66838149, 111043274, 133676298, 166564911, 333129822, 388651459, 499694733, 777302918, 999389466, 1165954377, 1499084199, 2331908754, 2998168398, 3497863131, 6995726262, 10493589393, 20987178786]

約数ペア:

[(1, 20987178786), (2, 10493589393), (3, 6995726262), (6, 3497863131), (7, 2998168398), (9, 2331908754), (14, 1499084199), (18, 1165954377), (21, 999389466), (27, 777302918), (42, 499694733), (54, 388651459), (63, 333129822), (126, 166564911), (157, 133676298), (189, 111043274), (314, 66838149), (378, 55521637), (471, 44558766), (942, 22279383), (1099, 19096614), (1413, 14852922), (2198, 9548307), (2826, 7426461), (3297, 6365538), (4239, 4950974), (6594, 3182769), (8478, 2475487), (9891, 2121846), (19782, 1060923), (29673, 707282), (59346, 353641)]