81208840

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{829}}^1$

素因数の和:950

約数の個数: 64

約数和(自身を含む): 191232000

約数和(自身を除く): 110023160

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 79, 124, 155, 158, 248, 310, 316, 395, 620, 632, 790, 829, 1240, 1580, 1658, 2449, 3160, 3316, 4145, 4898, 6632, 8290, 9796, 12245, 16580, 19592, 24490, 25699, 33160, 48980, 51398, 65491, 97960, 102796, 128495, 130982, 205592, 256990, 261964, 327455, 513980, 523928, 654910, 1027960, 1309820, 2030221, 2619640, 4060442, 8120884, 10151105, 16241768, 20302210, 40604420, 81208840]

約数ペア:

[(1, 81208840), (2, 40604420), (4, 20302210), (5, 16241768), (8, 10151105), (10, 8120884), (20, 4060442), (31, 2619640), (40, 2030221), (62, 1309820), (79, 1027960), (124, 654910), (155, 523928), (158, 513980), (248, 327455), (310, 261964), (316, 256990), (395, 205592), (620, 130982), (632, 128495), (790, 102796), (829, 97960), (1240, 65491), (1580, 51398), (1658, 48980), (2449, 33160), (3160, 25699), (3316, 24490), (4145, 19592), (4898, 16580), (6632, 12245), (8290, 9796)]