81727780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{193}}^1\times {\mathrm{683}}^1$

素因数の和:916

約数の個数: 48

約数和(自身を含む): 178343424

約数和(自身を除く): 96615644

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 193, 310, 386, 620, 683, 772, 965, 1366, 1930, 2732, 3415, 3860, 5983, 6830, 11966, 13660, 21173, 23932, 29915, 42346, 59830, 84692, 105865, 119660, 131819, 211730, 263638, 423460, 527276, 659095, 1318190, 2636380, 4086389, 8172778, 16345556, 20431945, 40863890, 81727780]

約数ペア:

[(1, 81727780), (2, 40863890), (4, 20431945), (5, 16345556), (10, 8172778), (20, 4086389), (31, 2636380), (62, 1318190), (124, 659095), (155, 527276), (193, 423460), (310, 263638), (386, 211730), (620, 131819), (683, 119660), (772, 105865), (965, 84692), (1366, 59830), (1930, 42346), (2732, 29915), (3415, 23932), (3860, 21173), (5983, 13660), (6830, 11966)]