19418880

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1$

素因数の和:426

約数の個数: 144

約数和(自身を含む): 66961440

約数和(自身を除く): 47542560

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 64, 65, 78, 80, 96, 104, 120, 128, 130, 156, 160, 192, 195, 208, 240, 256, 260, 312, 320, 384, 389, 390, 416, 480, 520, 624, 640, 768, 778, 780, 832, 960, 1040, 1167, 1248, 1280, 1556, 1560, 1664, 1920, 1945, 2080, 2334, 2496, 3112, 3120, 3328, 3840, 3890, 4160, 4668, 4992, 5057, 5835, 6224, 6240, 7780, 8320, 9336, 9984, 10114, 11670, 12448, 12480, 15171, 15560, 16640, 18672, 20228, 23340, 24896, 24960, 25285, 30342, 31120, 37344, 40456, 46680, 49792, 49920, 50570, 60684, 62240, 74688, 75855, 80912, 93360, 99584, 101140, 121368, 124480, 149376, 151710, 161824, 186720, 202280, 242736, 248960, 298752, 303420, 323648, 373440, 404560, 485472, 497920, 606840, 647296, 746880, 809120, 970944, 1213680, 1294592, 1493760, 1618240, 1941888, 2427360, 3236480, 3883776, 4854720, 6472960, 9709440, 19418880]

約数ペア:

[(1, 19418880), (2, 9709440), (3, 6472960), (4, 4854720), (5, 3883776), (6, 3236480), (8, 2427360), (10, 1941888), (12, 1618240), (13, 1493760), (15, 1294592), (16, 1213680), (20, 970944), (24, 809120), (26, 746880), (30, 647296), (32, 606840), (39, 497920), (40, 485472), (48, 404560), (52, 373440), (60, 323648), (64, 303420), (65, 298752), (78, 248960), (80, 242736), (96, 202280), (104, 186720), (120, 161824), (128, 151710), (130, 149376), (156, 124480), (160, 121368), (192, 101140), (195, 99584), (208, 93360), (240, 80912), (256, 75855), (260, 74688), (312, 62240), (320, 60684), (384, 50570), (389, 49920), (390, 49792), (416, 46680), (480, 40456), (520, 37344), (624, 31120), (640, 30342), (768, 25285), (778, 24960), (780, 24896), (832, 23340), (960, 20228), (1040, 18672), (1167, 16640), (1248, 15560), (1280, 15171), (1556, 12480), (1560, 12448), (1664, 11670), (1920, 10114), (1945, 9984), (2080, 9336), (2334, 8320), (2496, 7780), (3112, 6240), (3120, 6224), (3328, 5835), (3840, 5057), (3890, 4992), (4160, 4668)]