21519990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1523}}^1$

素因数の和:1693

約数の個数: 48

約数和(自身を含む): 56345328

約数和(自身を除く): 34825338

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 157, 314, 471, 785, 942, 1413, 1523, 1570, 2355, 2826, 3046, 4569, 4710, 7065, 7615, 9138, 13707, 14130, 15230, 22845, 27414, 45690, 68535, 137070, 239111, 478222, 717333, 1195555, 1434666, 2151999, 2391110, 3586665, 4303998, 7173330, 10759995, 21519990]

約数ペア:

[(1, 21519990), (2, 10759995), (3, 7173330), (5, 4303998), (6, 3586665), (9, 2391110), (10, 2151999), (15, 1434666), (18, 1195555), (30, 717333), (45, 478222), (90, 239111), (157, 137070), (314, 68535), (471, 45690), (785, 27414), (942, 22845), (1413, 15230), (1523, 14130), (1570, 13707), (2355, 9138), (2826, 7615), (3046, 7065), (4569, 4710)]