20970680

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{673}}^1$

素因数の和:744

約数の個数: 64

約数和(自身を含む): 50954400

約数和(自身を除く): 29983720

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 41, 76, 82, 95, 152, 164, 190, 205, 328, 380, 410, 673, 760, 779, 820, 1346, 1558, 1640, 2692, 3116, 3365, 3895, 5384, 6232, 6730, 7790, 12787, 13460, 15580, 25574, 26920, 27593, 31160, 51148, 55186, 63935, 102296, 110372, 127870, 137965, 220744, 255740, 275930, 511480, 524267, 551860, 1048534, 1103720, 2097068, 2621335, 4194136, 5242670, 10485340, 20970680]

約数ペア:

[(1, 20970680), (2, 10485340), (4, 5242670), (5, 4194136), (8, 2621335), (10, 2097068), (19, 1103720), (20, 1048534), (38, 551860), (40, 524267), (41, 511480), (76, 275930), (82, 255740), (95, 220744), (152, 137965), (164, 127870), (190, 110372), (205, 102296), (328, 63935), (380, 55186), (410, 51148), (673, 31160), (760, 27593), (779, 26920), (820, 25574), (1346, 15580), (1558, 13460), (1640, 12787), (2692, 7790), (3116, 6730), (3365, 6232), (3895, 5384)]