20420820

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{853}}^1$

素因数の和:894

約数の個数: 144

約数和(自身を含む): 74605440

約数和(自身を除く): 54184620

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 19, 20, 21, 28, 30, 35, 36, 38, 42, 45, 57, 60, 63, 70, 76, 84, 90, 95, 105, 114, 126, 133, 140, 171, 180, 190, 210, 228, 252, 266, 285, 315, 342, 380, 399, 420, 532, 570, 630, 665, 684, 798, 853, 855, 1140, 1197, 1260, 1330, 1596, 1706, 1710, 1995, 2394, 2559, 2660, 3412, 3420, 3990, 4265, 4788, 5118, 5971, 5985, 7677, 7980, 8530, 10236, 11942, 11970, 12795, 15354, 16207, 17060, 17913, 23884, 23940, 25590, 29855, 30708, 32414, 35826, 38385, 48621, 51180, 53739, 59710, 64828, 71652, 76770, 81035, 89565, 97242, 107478, 113449, 119420, 145863, 153540, 162070, 179130, 194484, 214956, 226898, 243105, 268695, 291726, 324140, 340347, 358260, 453796, 486210, 537390, 567245, 583452, 680694, 729315, 972420, 1021041, 1074780, 1134490, 1361388, 1458630, 1701735, 2042082, 2268980, 2917260, 3403470, 4084164, 5105205, 6806940, 10210410, 20420820]

約数ペア:

[(1, 20420820), (2, 10210410), (3, 6806940), (4, 5105205), (5, 4084164), (6, 3403470), (7, 2917260), (9, 2268980), (10, 2042082), (12, 1701735), (14, 1458630), (15, 1361388), (18, 1134490), (19, 1074780), (20, 1021041), (21, 972420), (28, 729315), (30, 680694), (35, 583452), (36, 567245), (38, 537390), (42, 486210), (45, 453796), (57, 358260), (60, 340347), (63, 324140), (70, 291726), (76, 268695), (84, 243105), (90, 226898), (95, 214956), (105, 194484), (114, 179130), (126, 162070), (133, 153540), (140, 145863), (171, 119420), (180, 113449), (190, 107478), (210, 97242), (228, 89565), (252, 81035), (266, 76770), (285, 71652), (315, 64828), (342, 59710), (380, 53739), (399, 51180), (420, 48621), (532, 38385), (570, 35826), (630, 32414), (665, 30708), (684, 29855), (798, 25590), (853, 23940), (855, 23884), (1140, 17913), (1197, 17060), (1260, 16207), (1330, 15354), (1596, 12795), (1706, 11970), (1710, 11942), (1995, 10236), (2394, 8530), (2559, 7980), (2660, 7677), (3412, 5985), (3420, 5971), (3990, 5118), (4265, 4788)]