64817920

素因数分解:

$2^8\times 5^1\times {\mathrm{79}}^1\times {\mathrm{641}}^1$

素因数の和:741

約数の個数: 72

約数和(自身を含む): 157469760

約数和(自身を除く): 92651840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 256, 316, 320, 395, 632, 640, 641, 790, 1264, 1280, 1282, 1580, 2528, 2564, 3160, 3205, 5056, 5128, 6320, 6410, 10112, 10256, 12640, 12820, 20224, 20512, 25280, 25640, 41024, 50560, 50639, 51280, 82048, 101120, 101278, 102560, 164096, 202556, 205120, 253195, 405112, 410240, 506390, 810224, 820480, 1012780, 1620448, 2025560, 3240896, 4051120, 6481792, 8102240, 12963584, 16204480, 32408960, 64817920]

約数ペア:

[(1, 64817920), (2, 32408960), (4, 16204480), (5, 12963584), (8, 8102240), (10, 6481792), (16, 4051120), (20, 3240896), (32, 2025560), (40, 1620448), (64, 1012780), (79, 820480), (80, 810224), (128, 506390), (158, 410240), (160, 405112), (256, 253195), (316, 205120), (320, 202556), (395, 164096), (632, 102560), (640, 101278), (641, 101120), (790, 82048), (1264, 51280), (1280, 50639), (1282, 50560), (1580, 41024), (2528, 25640), (2564, 25280), (3160, 20512), (3205, 20224), (5056, 12820), (5128, 12640), (6320, 10256), (6410, 10112)]