21280560

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{239}}^1$

素因数の和:315

約数の個数: 160

約数和(自身を含む): 77137920

約数和(自身を除く): 55857360

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 53, 56, 60, 70, 80, 84, 105, 106, 112, 120, 140, 159, 168, 210, 212, 239, 240, 265, 280, 318, 336, 371, 420, 424, 478, 530, 560, 636, 717, 742, 795, 840, 848, 956, 1060, 1113, 1195, 1272, 1434, 1484, 1590, 1673, 1680, 1855, 1912, 2120, 2226, 2390, 2544, 2868, 2968, 3180, 3346, 3585, 3710, 3824, 4240, 4452, 4780, 5019, 5565, 5736, 5936, 6360, 6692, 7170, 7420, 8365, 8904, 9560, 10038, 11130, 11472, 12667, 12720, 13384, 14340, 14840, 16730, 17808, 19120, 20076, 22260, 25095, 25334, 26768, 28680, 29680, 33460, 38001, 40152, 44520, 50190, 50668, 57360, 63335, 66920, 76002, 80304, 88669, 89040, 100380, 101336, 126670, 133840, 152004, 177338, 190005, 200760, 202672, 253340, 266007, 304008, 354676, 380010, 401520, 443345, 506680, 532014, 608016, 709352, 760020, 886690, 1013360, 1064028, 1330035, 1418704, 1520040, 1773380, 2128056, 2660070, 3040080, 3546760, 4256112, 5320140, 7093520, 10640280, 21280560]

約数ペア:

[(1, 21280560), (2, 10640280), (3, 7093520), (4, 5320140), (5, 4256112), (6, 3546760), (7, 3040080), (8, 2660070), (10, 2128056), (12, 1773380), (14, 1520040), (15, 1418704), (16, 1330035), (20, 1064028), (21, 1013360), (24, 886690), (28, 760020), (30, 709352), (35, 608016), (40, 532014), (42, 506680), (48, 443345), (53, 401520), (56, 380010), (60, 354676), (70, 304008), (80, 266007), (84, 253340), (105, 202672), (106, 200760), (112, 190005), (120, 177338), (140, 152004), (159, 133840), (168, 126670), (210, 101336), (212, 100380), (239, 89040), (240, 88669), (265, 80304), (280, 76002), (318, 66920), (336, 63335), (371, 57360), (420, 50668), (424, 50190), (478, 44520), (530, 40152), (560, 38001), (636, 33460), (717, 29680), (742, 28680), (795, 26768), (840, 25334), (848, 25095), (956, 22260), (1060, 20076), (1113, 19120), (1195, 17808), (1272, 16730), (1434, 14840), (1484, 14340), (1590, 13384), (1673, 12720), (1680, 12667), (1855, 11472), (1912, 11130), (2120, 10038), (2226, 9560), (2390, 8904), (2544, 8365), (2868, 7420), (2968, 7170), (3180, 6692), (3346, 6360), (3585, 5936), (3710, 5736), (3824, 5565), (4240, 5019), (4452, 4780)]