21091920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{3821}}^1$

素因数の和:3860

約数の個数: 80

約数和(自身を含む): 68245632

約数和(自身を除く): 47153712

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 23, 24, 30, 40, 46, 48, 60, 69, 80, 92, 115, 120, 138, 184, 230, 240, 276, 345, 368, 460, 552, 690, 920, 1104, 1380, 1840, 2760, 3821, 5520, 7642, 11463, 15284, 19105, 22926, 30568, 38210, 45852, 57315, 61136, 76420, 87883, 91704, 114630, 152840, 175766, 183408, 229260, 263649, 305680, 351532, 439415, 458520, 527298, 703064, 878830, 917040, 1054596, 1318245, 1406128, 1757660, 2109192, 2636490, 3515320, 4218384, 5272980, 7030640, 10545960, 21091920]

約数ペア:

[(1, 21091920), (2, 10545960), (3, 7030640), (4, 5272980), (5, 4218384), (6, 3515320), (8, 2636490), (10, 2109192), (12, 1757660), (15, 1406128), (16, 1318245), (20, 1054596), (23, 917040), (24, 878830), (30, 703064), (40, 527298), (46, 458520), (48, 439415), (60, 351532), (69, 305680), (80, 263649), (92, 229260), (115, 183408), (120, 175766), (138, 152840), (184, 114630), (230, 91704), (240, 87883), (276, 76420), (345, 61136), (368, 57315), (460, 45852), (552, 38210), (690, 30568), (920, 22926), (1104, 19105), (1380, 15284), (1840, 11463), (2760, 7642), (3821, 5520)]