21402720

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{167}}^1$

素因数の和:277

約数の個数: 144

約数和(自身を含む): 74299680

約数和(自身を除く): 52896960

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 80, 89, 90, 96, 120, 144, 160, 167, 178, 180, 240, 267, 288, 334, 356, 360, 445, 480, 501, 534, 668, 712, 720, 801, 835, 890, 1002, 1068, 1335, 1336, 1424, 1440, 1503, 1602, 1670, 1780, 2004, 2136, 2505, 2670, 2672, 2848, 3006, 3204, 3340, 3560, 4005, 4008, 4272, 5010, 5340, 5344, 6012, 6408, 6680, 7120, 7515, 8010, 8016, 8544, 10020, 10680, 12024, 12816, 13360, 14240, 14863, 15030, 16020, 16032, 20040, 21360, 24048, 25632, 26720, 29726, 30060, 32040, 40080, 42720, 44589, 48096, 59452, 60120, 64080, 74315, 80160, 89178, 118904, 120240, 128160, 133767, 148630, 178356, 222945, 237808, 240480, 267534, 297260, 356712, 445890, 475616, 535068, 594520, 668835, 713424, 891780, 1070136, 1189040, 1337670, 1426848, 1783560, 2140272, 2378080, 2675340, 3567120, 4280544, 5350680, 7134240, 10701360, 21402720]

約数ペア:

[(1, 21402720), (2, 10701360), (3, 7134240), (4, 5350680), (5, 4280544), (6, 3567120), (8, 2675340), (9, 2378080), (10, 2140272), (12, 1783560), (15, 1426848), (16, 1337670), (18, 1189040), (20, 1070136), (24, 891780), (30, 713424), (32, 668835), (36, 594520), (40, 535068), (45, 475616), (48, 445890), (60, 356712), (72, 297260), (80, 267534), (89, 240480), (90, 237808), (96, 222945), (120, 178356), (144, 148630), (160, 133767), (167, 128160), (178, 120240), (180, 118904), (240, 89178), (267, 80160), (288, 74315), (334, 64080), (356, 60120), (360, 59452), (445, 48096), (480, 44589), (501, 42720), (534, 40080), (668, 32040), (712, 30060), (720, 29726), (801, 26720), (835, 25632), (890, 24048), (1002, 21360), (1068, 20040), (1335, 16032), (1336, 16020), (1424, 15030), (1440, 14863), (1503, 14240), (1602, 13360), (1670, 12816), (1780, 12024), (2004, 10680), (2136, 10020), (2505, 8544), (2670, 8016), (2672, 8010), (2848, 7515), (3006, 7120), (3204, 6680), (3340, 6408), (3560, 6012), (4005, 5344), (4008, 5340), (4272, 5010)]