21978840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{193}}^1$

素因数の和:293

約数の個数: 128

約数和(自身を含む): 72354240

約数和(自身を除く): 50375400

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 73, 78, 104, 120, 130, 146, 156, 193, 195, 219, 260, 292, 312, 365, 386, 390, 438, 520, 579, 584, 730, 772, 780, 876, 949, 965, 1095, 1158, 1460, 1544, 1560, 1752, 1898, 1930, 2190, 2316, 2509, 2847, 2895, 2920, 3796, 3860, 4380, 4632, 4745, 5018, 5694, 5790, 7527, 7592, 7720, 8760, 9490, 10036, 11388, 11580, 12545, 14089, 14235, 15054, 18980, 20072, 22776, 23160, 25090, 28178, 28470, 30108, 37635, 37960, 42267, 50180, 56356, 56940, 60216, 70445, 75270, 84534, 100360, 112712, 113880, 140890, 150540, 169068, 183157, 211335, 281780, 301080, 338136, 366314, 422670, 549471, 563560, 732628, 845340, 915785, 1098942, 1465256, 1690680, 1831570, 2197884, 2747355, 3663140, 4395768, 5494710, 7326280, 10989420, 21978840]

約数ペア:

[(1, 21978840), (2, 10989420), (3, 7326280), (4, 5494710), (5, 4395768), (6, 3663140), (8, 2747355), (10, 2197884), (12, 1831570), (13, 1690680), (15, 1465256), (20, 1098942), (24, 915785), (26, 845340), (30, 732628), (39, 563560), (40, 549471), (52, 422670), (60, 366314), (65, 338136), (73, 301080), (78, 281780), (104, 211335), (120, 183157), (130, 169068), (146, 150540), (156, 140890), (193, 113880), (195, 112712), (219, 100360), (260, 84534), (292, 75270), (312, 70445), (365, 60216), (386, 56940), (390, 56356), (438, 50180), (520, 42267), (579, 37960), (584, 37635), (730, 30108), (772, 28470), (780, 28178), (876, 25090), (949, 23160), (965, 22776), (1095, 20072), (1158, 18980), (1460, 15054), (1544, 14235), (1560, 14089), (1752, 12545), (1898, 11580), (1930, 11388), (2190, 10036), (2316, 9490), (2509, 8760), (2847, 7720), (2895, 7592), (2920, 7527), (3796, 5790), (3860, 5694), (4380, 5018), (4632, 4745)]