21000780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{6863}}^1$

素因数の和:6895

約数の個数: 72

約数和(自身を含む): 67459392

約数和(自身を除く): 46458612

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 68, 85, 90, 102, 153, 170, 180, 204, 255, 306, 340, 510, 612, 765, 1020, 1530, 3060, 6863, 13726, 20589, 27452, 34315, 41178, 61767, 68630, 82356, 102945, 116671, 123534, 137260, 205890, 233342, 247068, 308835, 350013, 411780, 466684, 583355, 617670, 700026, 1050039, 1166710, 1235340, 1400052, 1750065, 2100078, 2333420, 3500130, 4200156, 5250195, 7000260, 10500390, 21000780]

約数ペア:

[(1, 21000780), (2, 10500390), (3, 7000260), (4, 5250195), (5, 4200156), (6, 3500130), (9, 2333420), (10, 2100078), (12, 1750065), (15, 1400052), (17, 1235340), (18, 1166710), (20, 1050039), (30, 700026), (34, 617670), (36, 583355), (45, 466684), (51, 411780), (60, 350013), (68, 308835), (85, 247068), (90, 233342), (102, 205890), (153, 137260), (170, 123534), (180, 116671), (204, 102945), (255, 82356), (306, 68630), (340, 61767), (510, 41178), (612, 34315), (765, 27452), (1020, 20589), (1530, 13726), (3060, 6863)]