21457005340

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^2\times {\mathrm{109}}^1\times {\mathrm{1847}}^1$

素因数の和:2111

約数の個数: 72

約数和(自身を含む): 46129517280

約数和(自身を除く): 24672511940

約数列:

[1, 2, 4, 5, 10, 20, 73, 109, 146, 218, 292, 365, 436, 545, 730, 1090, 1460, 1847, 2180, 3694, 5329, 7388, 7957, 9235, 10658, 15914, 18470, 21316, 26645, 31828, 36940, 39785, 53290, 79570, 106580, 134831, 159140, 201323, 269662, 402646, 539324, 580861, 674155, 805292, 1006615, 1161722, 1348310, 2013230, 2323444, 2696620, 2904305, 4026460, 5808610, 9842663, 11617220, 14696579, 19685326, 29393158, 39370652, 49213315, 58786316, 73482895, 98426630, 146965790, 196853260, 293931580, 1072850267, 2145700534, 4291401068, 5364251335, 10728502670, 21457005340]

約数ペア:

[(1, 21457005340), (2, 10728502670), (4, 5364251335), (5, 4291401068), (10, 2145700534), (20, 1072850267), (73, 293931580), (109, 196853260), (146, 146965790), (218, 98426630), (292, 73482895), (365, 58786316), (436, 49213315), (545, 39370652), (730, 29393158), (1090, 19685326), (1460, 14696579), (1847, 11617220), (2180, 9842663), (3694, 5808610), (5329, 4026460), (7388, 2904305), (7957, 2696620), (9235, 2323444), (10658, 2013230), (15914, 1348310), (18470, 1161722), (21316, 1006615), (26645, 805292), (31828, 674155), (36940, 580861), (39785, 539324), (53290, 402646), (79570, 269662), (106580, 201323), (134831, 159140)]