21003900

素因数分解:

$2^2\times 3^1\times 5^2\times {\mathrm{53}}^1\times {\mathrm{1321}}^1$

素因数の和:1391

約数の個数: 72

約数和(自身を含む): 61964784

約数和(自身を除く): 40960884

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 25, 30, 50, 53, 60, 75, 100, 106, 150, 159, 212, 265, 300, 318, 530, 636, 795, 1060, 1321, 1325, 1590, 2642, 2650, 3180, 3963, 3975, 5284, 5300, 6605, 7926, 7950, 13210, 15852, 15900, 19815, 26420, 33025, 39630, 66050, 70013, 79260, 99075, 132100, 140026, 198150, 210039, 280052, 350065, 396300, 420078, 700130, 840156, 1050195, 1400260, 1750325, 2100390, 3500650, 4200780, 5250975, 7001300, 10501950, 21003900]

約数ペア:

[(1, 21003900), (2, 10501950), (3, 7001300), (4, 5250975), (5, 4200780), (6, 3500650), (10, 2100390), (12, 1750325), (15, 1400260), (20, 1050195), (25, 840156), (30, 700130), (50, 420078), (53, 396300), (60, 350065), (75, 280052), (100, 210039), (106, 198150), (150, 140026), (159, 132100), (212, 99075), (265, 79260), (300, 70013), (318, 66050), (530, 39630), (636, 33025), (795, 26420), (1060, 19815), (1321, 15900), (1325, 15852), (1590, 13210), (2642, 7950), (2650, 7926), (3180, 6605), (3963, 5300), (3975, 5284)]