81971820

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{971}}^1$

素因数の和:1060

約数の個数: 144

約数和(自身を含む): 288707328

約数和(自身を除く): 206735508

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 67, 70, 84, 90, 105, 126, 134, 140, 180, 201, 210, 252, 268, 315, 335, 402, 420, 469, 603, 630, 670, 804, 938, 971, 1005, 1206, 1260, 1340, 1407, 1876, 1942, 2010, 2345, 2412, 2814, 2913, 3015, 3884, 4020, 4221, 4690, 4855, 5628, 5826, 6030, 6797, 7035, 8442, 8739, 9380, 9710, 11652, 12060, 13594, 14070, 14565, 16884, 17478, 19420, 20391, 21105, 27188, 28140, 29130, 33985, 34956, 40782, 42210, 43695, 58260, 61173, 65057, 67970, 81564, 84420, 87390, 101955, 122346, 130114, 135940, 174780, 195171, 203910, 244692, 260228, 305865, 325285, 390342, 407820, 455399, 585513, 611730, 650570, 780684, 910798, 975855, 1171026, 1223460, 1301140, 1366197, 1821596, 1951710, 2276995, 2342052, 2732394, 2927565, 3903420, 4098591, 4553990, 5464788, 5855130, 6830985, 8197182, 9107980, 11710260, 13661970, 16394364, 20492955, 27323940, 40985910, 81971820]

約数ペア:

[(1, 81971820), (2, 40985910), (3, 27323940), (4, 20492955), (5, 16394364), (6, 13661970), (7, 11710260), (9, 9107980), (10, 8197182), (12, 6830985), (14, 5855130), (15, 5464788), (18, 4553990), (20, 4098591), (21, 3903420), (28, 2927565), (30, 2732394), (35, 2342052), (36, 2276995), (42, 1951710), (45, 1821596), (60, 1366197), (63, 1301140), (67, 1223460), (70, 1171026), (84, 975855), (90, 910798), (105, 780684), (126, 650570), (134, 611730), (140, 585513), (180, 455399), (201, 407820), (210, 390342), (252, 325285), (268, 305865), (315, 260228), (335, 244692), (402, 203910), (420, 195171), (469, 174780), (603, 135940), (630, 130114), (670, 122346), (804, 101955), (938, 87390), (971, 84420), (1005, 81564), (1206, 67970), (1260, 65057), (1340, 61173), (1407, 58260), (1876, 43695), (1942, 42210), (2010, 40782), (2345, 34956), (2412, 33985), (2814, 29130), (2913, 28140), (3015, 27188), (3884, 21105), (4020, 20391), (4221, 19420), (4690, 17478), (4855, 16884), (5628, 14565), (5826, 14070), (6030, 13594), (6797, 12060), (7035, 11652), (8442, 9710), (8739, 9380)]