21509648

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{151}}^1\times {\mathrm{307}}^1$

素因数の和:495

約数の個数: 40

約数和(自身を含む): 43538880

約数和(自身を除く): 22029232

約数列:

[1, 2, 4, 8, 16, 29, 58, 116, 151, 232, 302, 307, 464, 604, 614, 1208, 1228, 2416, 2456, 4379, 4912, 8758, 8903, 17516, 17806, 35032, 35612, 46357, 70064, 71224, 92714, 142448, 185428, 370856, 741712, 1344353, 2688706, 5377412, 10754824, 21509648]

約数ペア:

[(1, 21509648), (2, 10754824), (4, 5377412), (8, 2688706), (16, 1344353), (29, 741712), (58, 370856), (116, 185428), (151, 142448), (232, 92714), (302, 71224), (307, 70064), (464, 46357), (604, 35612), (614, 35032), (1208, 17806), (1228, 17516), (2416, 8903), (2456, 8758), (4379, 4912)]