19959840

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{167}}^1$

素因数の和:271

約数の個数: 144

約数和(自身を含む): 69346368

約数和(自身を除く): 49386528

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, 83, 90, 96, 120, 144, 160, 166, 167, 180, 240, 249, 288, 332, 334, 360, 415, 480, 498, 501, 664, 668, 720, 747, 830, 835, 996, 1002, 1245, 1328, 1336, 1440, 1494, 1503, 1660, 1670, 1992, 2004, 2490, 2505, 2656, 2672, 2988, 3006, 3320, 3340, 3735, 3984, 4008, 4980, 5010, 5344, 5976, 6012, 6640, 6680, 7470, 7515, 7968, 8016, 9960, 10020, 11952, 12024, 13280, 13360, 13861, 14940, 15030, 16032, 19920, 20040, 23904, 24048, 26720, 27722, 29880, 30060, 39840, 40080, 41583, 48096, 55444, 59760, 60120, 69305, 80160, 83166, 110888, 119520, 120240, 124749, 138610, 166332, 207915, 221776, 240480, 249498, 277220, 332664, 415830, 443552, 498996, 554440, 623745, 665328, 831660, 997992, 1108880, 1247490, 1330656, 1663320, 1995984, 2217760, 2494980, 3326640, 3991968, 4989960, 6653280, 9979920, 19959840]

約数ペア:

[(1, 19959840), (2, 9979920), (3, 6653280), (4, 4989960), (5, 3991968), (6, 3326640), (8, 2494980), (9, 2217760), (10, 1995984), (12, 1663320), (15, 1330656), (16, 1247490), (18, 1108880), (20, 997992), (24, 831660), (30, 665328), (32, 623745), (36, 554440), (40, 498996), (45, 443552), (48, 415830), (60, 332664), (72, 277220), (80, 249498), (83, 240480), (90, 221776), (96, 207915), (120, 166332), (144, 138610), (160, 124749), (166, 120240), (167, 119520), (180, 110888), (240, 83166), (249, 80160), (288, 69305), (332, 60120), (334, 59760), (360, 55444), (415, 48096), (480, 41583), (498, 40080), (501, 39840), (664, 30060), (668, 29880), (720, 27722), (747, 26720), (830, 24048), (835, 23904), (996, 20040), (1002, 19920), (1245, 16032), (1328, 15030), (1336, 14940), (1440, 13861), (1494, 13360), (1503, 13280), (1660, 12024), (1670, 11952), (1992, 10020), (2004, 9960), (2490, 8016), (2505, 7968), (2656, 7515), (2672, 7470), (2988, 6680), (3006, 6640), (3320, 6012), (3340, 5976), (3735, 5344), (3984, 5010), (4008, 4980)]