21131950

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{173}}^1\times {\mathrm{349}}^1$

素因数の和:541

約数の個数: 48

約数和(自身を含む): 45309600

約数和(自身を除く): 24177650

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 173, 175, 346, 349, 350, 698, 865, 1211, 1730, 1745, 2422, 2443, 3490, 4325, 4886, 6055, 8650, 8725, 12110, 12215, 17450, 24430, 30275, 60377, 60550, 61075, 120754, 122150, 301885, 422639, 603770, 845278, 1509425, 2113195, 3018850, 4226390, 10565975, 21131950]

約数ペア:

[(1, 21131950), (2, 10565975), (5, 4226390), (7, 3018850), (10, 2113195), (14, 1509425), (25, 845278), (35, 603770), (50, 422639), (70, 301885), (173, 122150), (175, 120754), (346, 61075), (349, 60550), (350, 60377), (698, 30275), (865, 24430), (1211, 17450), (1730, 12215), (1745, 12110), (2422, 8725), (2443, 8650), (3490, 6055), (4325, 4886)]