21978320

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{3019}}^1$

素因数の和:3052

約数の個数: 80

約数和(自身を含む): 62912640

約数和(自身を除く): 40934320

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 182, 208, 260, 280, 364, 455, 520, 560, 728, 910, 1040, 1456, 1820, 3019, 3640, 6038, 7280, 12076, 15095, 21133, 24152, 30190, 39247, 42266, 48304, 60380, 78494, 84532, 105665, 120760, 156988, 169064, 196235, 211330, 241520, 274729, 313976, 338128, 392470, 422660, 549458, 627952, 784940, 845320, 1098916, 1373645, 1569880, 1690640, 2197832, 2747290, 3139760, 4395664, 5494580, 10989160, 21978320]

約数ペア:

[(1, 21978320), (2, 10989160), (4, 5494580), (5, 4395664), (7, 3139760), (8, 2747290), (10, 2197832), (13, 1690640), (14, 1569880), (16, 1373645), (20, 1098916), (26, 845320), (28, 784940), (35, 627952), (40, 549458), (52, 422660), (56, 392470), (65, 338128), (70, 313976), (80, 274729), (91, 241520), (104, 211330), (112, 196235), (130, 169064), (140, 156988), (182, 120760), (208, 105665), (260, 84532), (280, 78494), (364, 60380), (455, 48304), (520, 42266), (560, 39247), (728, 30190), (910, 24152), (1040, 21133), (1456, 15095), (1820, 12076), (3019, 7280), (3640, 6038)]