21215697920

素因数分解:

$2^{10}\times 5^1\times {\mathrm{19}}^1\times {\mathrm{467}}^2$

素因数の和:978

約数の個数: 132

約数和(自身を含む): 53686341480

約数和(自身を除く): 32470643560

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 256, 304, 320, 380, 467, 512, 608, 640, 760, 934, 1024, 1216, 1280, 1520, 1868, 2335, 2432, 2560, 3040, 3736, 4670, 4864, 5120, 6080, 7472, 8873, 9340, 9728, 12160, 14944, 17746, 18680, 19456, 24320, 29888, 35492, 37360, 44365, 48640, 59776, 70984, 74720, 88730, 97280, 119552, 141968, 149440, 177460, 218089, 239104, 283936, 298880, 354920, 436178, 478208, 567872, 597760, 709840, 872356, 1090445, 1135744, 1195520, 1419680, 1744712, 2180890, 2271488, 2391040, 2839360, 3489424, 4143691, 4361780, 4542976, 5678720, 6978848, 8287382, 8723560, 9085952, 11357440, 13957696, 16574764, 17447120, 20718455, 22714880, 27915392, 33149528, 34894240, 41436910, 45429760, 55830784, 66299056, 69788480, 82873820, 111661568, 132598112, 139576960, 165747640, 223323136, 265196224, 279153920, 331495280, 530392448, 558307840, 662990560, 1060784896, 1116615680, 1325981120, 2121569792, 2651962240, 4243139584, 5303924480, 10607848960, 21215697920]

約数ペア:

[(1, 21215697920), (2, 10607848960), (4, 5303924480), (5, 4243139584), (8, 2651962240), (10, 2121569792), (16, 1325981120), (19, 1116615680), (20, 1060784896), (32, 662990560), (38, 558307840), (40, 530392448), (64, 331495280), (76, 279153920), (80, 265196224), (95, 223323136), (128, 165747640), (152, 139576960), (160, 132598112), (190, 111661568), (256, 82873820), (304, 69788480), (320, 66299056), (380, 55830784), (467, 45429760), (512, 41436910), (608, 34894240), (640, 33149528), (760, 27915392), (934, 22714880), (1024, 20718455), (1216, 17447120), (1280, 16574764), (1520, 13957696), (1868, 11357440), (2335, 9085952), (2432, 8723560), (2560, 8287382), (3040, 6978848), (3736, 5678720), (4670, 4542976), (4864, 4361780), (5120, 4143691), (6080, 3489424), (7472, 2839360), (8873, 2391040), (9340, 2271488), (9728, 2180890), (12160, 1744712), (14944, 1419680), (17746, 1195520), (18680, 1135744), (19456, 1090445), (24320, 872356), (29888, 709840), (35492, 597760), (37360, 567872), (44365, 478208), (48640, 436178), (59776, 354920), (70984, 298880), (74720, 283936), (88730, 239104), (97280, 218089), (119552, 177460), (141968, 149440)]