81621340

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{347}}^1\times {\mathrm{619}}^1$

素因数の和:994

約数の個数: 48

約数和(自身を含む): 181238400

約数和(自身を除く): 99617060

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 347, 380, 619, 694, 1238, 1388, 1735, 2476, 3095, 3470, 6190, 6593, 6940, 11761, 12380, 13186, 23522, 26372, 32965, 47044, 58805, 65930, 117610, 131860, 214793, 235220, 429586, 859172, 1073965, 2147930, 4081067, 4295860, 8162134, 16324268, 20405335, 40810670, 81621340]

約数ペア:

[(1, 81621340), (2, 40810670), (4, 20405335), (5, 16324268), (10, 8162134), (19, 4295860), (20, 4081067), (38, 2147930), (76, 1073965), (95, 859172), (190, 429586), (347, 235220), (380, 214793), (619, 131860), (694, 117610), (1238, 65930), (1388, 58805), (1735, 47044), (2476, 32965), (3095, 26372), (3470, 23522), (6190, 13186), (6593, 12380), (6940, 11761)]