77655440

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{15913}}^1$

素因数の和:15987

約数の個数: 40

約数和(自身を含む): 183520248

約数和(自身を除く): 105864808

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4880, 15913, 31826, 63652, 79565, 127304, 159130, 254608, 318260, 636520, 970693, 1273040, 1941386, 3882772, 4853465, 7765544, 9706930, 15531088, 19413860, 38827720, 77655440]

約数ペア:

[(1, 77655440), (2, 38827720), (4, 19413860), (5, 15531088), (8, 9706930), (10, 7765544), (16, 4853465), (20, 3882772), (40, 1941386), (61, 1273040), (80, 970693), (122, 636520), (244, 318260), (305, 254608), (488, 159130), (610, 127304), (976, 79565), (1220, 63652), (2440, 31826), (4880, 15913)]