78387920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{3967}}^1$

素因数の和:4012

約数の個数: 80

約数和(自身を含む): 206653440

約数和(自身を除く): 128265520

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 190, 208, 247, 260, 304, 380, 494, 520, 760, 988, 1040, 1235, 1520, 1976, 2470, 3952, 3967, 4940, 7934, 9880, 15868, 19760, 19835, 31736, 39670, 51571, 63472, 75373, 79340, 103142, 150746, 158680, 206284, 257855, 301492, 317360, 376865, 412568, 515710, 602984, 753730, 825136, 979849, 1031420, 1205968, 1507460, 1959698, 2062840, 3014920, 3919396, 4125680, 4899245, 6029840, 7838792, 9798490, 15677584, 19596980, 39193960, 78387920]

約数ペア:

[(1, 78387920), (2, 39193960), (4, 19596980), (5, 15677584), (8, 9798490), (10, 7838792), (13, 6029840), (16, 4899245), (19, 4125680), (20, 3919396), (26, 3014920), (38, 2062840), (40, 1959698), (52, 1507460), (65, 1205968), (76, 1031420), (80, 979849), (95, 825136), (104, 753730), (130, 602984), (152, 515710), (190, 412568), (208, 376865), (247, 317360), (260, 301492), (304, 257855), (380, 206284), (494, 158680), (520, 150746), (760, 103142), (988, 79340), (1040, 75373), (1235, 63472), (1520, 51571), (1976, 39670), (2470, 31736), (3952, 19835), (3967, 19760), (4940, 15868), (7934, 9880)]