81121460

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:166

約数の個数: 144

約数和(自身を含む): 213736320

約数和(自身を除く): 132614860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 49, 59, 61, 70, 92, 98, 115, 118, 122, 140, 161, 196, 230, 236, 244, 245, 295, 305, 322, 413, 427, 460, 490, 590, 610, 644, 805, 826, 854, 980, 1127, 1180, 1220, 1357, 1403, 1610, 1652, 1708, 2065, 2135, 2254, 2714, 2806, 2891, 2989, 3220, 3599, 4130, 4270, 4508, 5428, 5612, 5635, 5782, 5978, 6785, 7015, 7198, 8260, 8540, 9499, 9821, 11270, 11564, 11956, 13570, 14030, 14396, 14455, 14945, 17995, 18998, 19642, 22540, 25193, 27140, 28060, 28910, 29890, 35990, 37996, 39284, 47495, 49105, 50386, 57820, 59780, 66493, 68747, 71980, 82777, 94990, 98210, 100772, 125965, 132986, 137494, 165554, 176351, 189980, 196420, 251930, 265972, 274988, 331108, 332465, 343735, 352702, 413885, 503860, 579439, 664930, 687470, 705404, 827770, 881755, 1158878, 1329860, 1374940, 1655540, 1763510, 2317756, 2897195, 3527020, 4056073, 5794390, 8112146, 11588780, 16224292, 20280365, 40560730, 81121460]

約数ペア:

[(1, 81121460), (2, 40560730), (4, 20280365), (5, 16224292), (7, 11588780), (10, 8112146), (14, 5794390), (20, 4056073), (23, 3527020), (28, 2897195), (35, 2317756), (46, 1763510), (49, 1655540), (59, 1374940), (61, 1329860), (70, 1158878), (92, 881755), (98, 827770), (115, 705404), (118, 687470), (122, 664930), (140, 579439), (161, 503860), (196, 413885), (230, 352702), (236, 343735), (244, 332465), (245, 331108), (295, 274988), (305, 265972), (322, 251930), (413, 196420), (427, 189980), (460, 176351), (490, 165554), (590, 137494), (610, 132986), (644, 125965), (805, 100772), (826, 98210), (854, 94990), (980, 82777), (1127, 71980), (1180, 68747), (1220, 66493), (1357, 59780), (1403, 57820), (1610, 50386), (1652, 49105), (1708, 47495), (2065, 39284), (2135, 37996), (2254, 35990), (2714, 29890), (2806, 28910), (2891, 28060), (2989, 27140), (3220, 25193), (3599, 22540), (4130, 19642), (4270, 18998), (4508, 17995), (5428, 14945), (5612, 14455), (5635, 14396), (5782, 14030), (5978, 13570), (6785, 11956), (7015, 11564), (7198, 11270), (8260, 9821), (8540, 9499)]