21380320

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{541}}^1$

素因数の和:588

約数の個数: 96

約数和(自身を含む): 57365280

約数和(自身を除く): 35984960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 160, 190, 208, 247, 260, 304, 380, 416, 494, 520, 541, 608, 760, 988, 1040, 1082, 1235, 1520, 1976, 2080, 2164, 2470, 2705, 3040, 3952, 4328, 4940, 5410, 7033, 7904, 8656, 9880, 10279, 10820, 14066, 17312, 19760, 20558, 21640, 28132, 35165, 39520, 41116, 43280, 51395, 56264, 70330, 82232, 86560, 102790, 112528, 133627, 140660, 164464, 205580, 225056, 267254, 281320, 328928, 411160, 534508, 562640, 668135, 822320, 1069016, 1125280, 1336270, 1644640, 2138032, 2672540, 4276064, 5345080, 10690160, 21380320]

約数ペア:

[(1, 21380320), (2, 10690160), (4, 5345080), (5, 4276064), (8, 2672540), (10, 2138032), (13, 1644640), (16, 1336270), (19, 1125280), (20, 1069016), (26, 822320), (32, 668135), (38, 562640), (40, 534508), (52, 411160), (65, 328928), (76, 281320), (80, 267254), (95, 225056), (104, 205580), (130, 164464), (152, 140660), (160, 133627), (190, 112528), (208, 102790), (247, 86560), (260, 82232), (304, 70330), (380, 56264), (416, 51395), (494, 43280), (520, 41116), (541, 39520), (608, 35165), (760, 28132), (988, 21640), (1040, 20558), (1082, 19760), (1235, 17312), (1520, 14066), (1976, 10820), (2080, 10279), (2164, 9880), (2470, 8656), (2705, 7904), (3040, 7033), (3952, 5410), (4328, 4940)]