21151120

素因数分解:

$2^4\times 5^1\times {\mathrm{419}}^1\times {\mathrm{631}}^1$

素因数の和:1063

約数の個数: 40

約数和(自身を含む): 49371840

約数和(自身を除く): 28220720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 419, 631, 838, 1262, 1676, 2095, 2524, 3155, 3352, 4190, 5048, 6310, 6704, 8380, 10096, 12620, 16760, 25240, 33520, 50480, 264389, 528778, 1057556, 1321945, 2115112, 2643890, 4230224, 5287780, 10575560, 21151120]

約数ペア:

[(1, 21151120), (2, 10575560), (4, 5287780), (5, 4230224), (8, 2643890), (10, 2115112), (16, 1321945), (20, 1057556), (40, 528778), (80, 264389), (419, 50480), (631, 33520), (838, 25240), (1262, 16760), (1676, 12620), (2095, 10096), (2524, 8380), (3155, 6704), (3352, 6310), (4190, 5048)]