18959720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{101}}^1$

素因数の和:163

約数の個数: 96

約数和(自身を含む): 48966120

約数和(自身を除く): 30006400

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 52, 65, 76, 95, 101, 104, 130, 152, 190, 202, 247, 260, 361, 380, 404, 494, 505, 520, 722, 760, 808, 988, 1010, 1235, 1313, 1444, 1805, 1919, 1976, 2020, 2470, 2626, 2888, 3610, 3838, 4040, 4693, 4940, 5252, 6565, 7220, 7676, 9386, 9595, 9880, 10504, 13130, 14440, 15352, 18772, 19190, 23465, 24947, 26260, 36461, 37544, 38380, 46930, 49894, 52520, 72922, 76760, 93860, 99788, 124735, 145844, 182305, 187720, 199576, 249470, 291688, 364610, 473993, 498940, 729220, 947986, 997880, 1458440, 1895972, 2369965, 3791944, 4739930, 9479860, 18959720]

約数ペア:

[(1, 18959720), (2, 9479860), (4, 4739930), (5, 3791944), (8, 2369965), (10, 1895972), (13, 1458440), (19, 997880), (20, 947986), (26, 729220), (38, 498940), (40, 473993), (52, 364610), (65, 291688), (76, 249470), (95, 199576), (101, 187720), (104, 182305), (130, 145844), (152, 124735), (190, 99788), (202, 93860), (247, 76760), (260, 72922), (361, 52520), (380, 49894), (404, 46930), (494, 38380), (505, 37544), (520, 36461), (722, 26260), (760, 24947), (808, 23465), (988, 19190), (1010, 18772), (1235, 15352), (1313, 14440), (1444, 13130), (1805, 10504), (1919, 9880), (1976, 9595), (2020, 9386), (2470, 7676), (2626, 7220), (2888, 6565), (3610, 5252), (3838, 4940), (4040, 4693)]