21303220

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{131}}^1\times {\mathrm{173}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 46303488

約数和(自身を除く): 25000268

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 131, 173, 188, 235, 262, 346, 470, 524, 655, 692, 865, 940, 1310, 1730, 2620, 3460, 6157, 8131, 12314, 16262, 22663, 24628, 30785, 32524, 40655, 45326, 61570, 81310, 90652, 113315, 123140, 162620, 226630, 453260, 1065161, 2130322, 4260644, 5325805, 10651610, 21303220]

約数ペア:

[(1, 21303220), (2, 10651610), (4, 5325805), (5, 4260644), (10, 2130322), (20, 1065161), (47, 453260), (94, 226630), (131, 162620), (173, 123140), (188, 113315), (235, 90652), (262, 81310), (346, 61570), (470, 45326), (524, 40655), (655, 32524), (692, 30785), (865, 24628), (940, 22663), (1310, 16262), (1730, 12314), (2620, 8131), (3460, 6157)]