81895660

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:212

約数の個数: 144

約数和(自身を含む): 223388928

約数和(自身を除く): 141493268

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 71, 77, 98, 107, 110, 140, 142, 154, 196, 214, 220, 245, 284, 308, 355, 385, 428, 490, 497, 535, 539, 710, 749, 770, 781, 980, 994, 1070, 1078, 1177, 1420, 1498, 1540, 1562, 1988, 2140, 2156, 2354, 2485, 2695, 2996, 3124, 3479, 3745, 3905, 4708, 4970, 5243, 5390, 5467, 5885, 6958, 7490, 7597, 7810, 8239, 9940, 10486, 10780, 10934, 11770, 13916, 14980, 15194, 15620, 16478, 17395, 20972, 21868, 23540, 26215, 27335, 30388, 32956, 34790, 37985, 38269, 41195, 52430, 53179, 54670, 57673, 69580, 75970, 76538, 82390, 83567, 104860, 106358, 109340, 115346, 151940, 153076, 164780, 167134, 191345, 212716, 230692, 265895, 288365, 334268, 372253, 382690, 417835, 531790, 576730, 584969, 744506, 765380, 835670, 1063580, 1153460, 1169938, 1489012, 1671340, 1861265, 2339876, 2924845, 3722530, 4094783, 5849690, 7445060, 8189566, 11699380, 16379132, 20473915, 40947830, 81895660]

約数ペア:

[(1, 81895660), (2, 40947830), (4, 20473915), (5, 16379132), (7, 11699380), (10, 8189566), (11, 7445060), (14, 5849690), (20, 4094783), (22, 3722530), (28, 2924845), (35, 2339876), (44, 1861265), (49, 1671340), (55, 1489012), (70, 1169938), (71, 1153460), (77, 1063580), (98, 835670), (107, 765380), (110, 744506), (140, 584969), (142, 576730), (154, 531790), (196, 417835), (214, 382690), (220, 372253), (245, 334268), (284, 288365), (308, 265895), (355, 230692), (385, 212716), (428, 191345), (490, 167134), (497, 164780), (535, 153076), (539, 151940), (710, 115346), (749, 109340), (770, 106358), (781, 104860), (980, 83567), (994, 82390), (1070, 76538), (1078, 75970), (1177, 69580), (1420, 57673), (1498, 54670), (1540, 53179), (1562, 52430), (1988, 41195), (2140, 38269), (2156, 37985), (2354, 34790), (2485, 32956), (2695, 30388), (2996, 27335), (3124, 26215), (3479, 23540), (3745, 21868), (3905, 20972), (4708, 17395), (4970, 16478), (5243, 15620), (5390, 15194), (5467, 14980), (5885, 13916), (6958, 11770), (7490, 10934), (7597, 10780), (7810, 10486), (8239, 9940)]