21721869

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{163}}^1$

素因数の和:266

約数の個数: 48

約数和(自身を含む): 36533952

約数和(自身を除く): 14812083

約数列:

[1, 3, 9, 13, 17, 39, 51, 67, 117, 153, 163, 201, 221, 489, 603, 663, 871, 1139, 1467, 1989, 2119, 2613, 2771, 3417, 6357, 7839, 8313, 10251, 10921, 14807, 19071, 24939, 32763, 36023, 44421, 98289, 108069, 133263, 141973, 185657, 324207, 425919, 556971, 1277757, 1670913, 2413541, 7240623, 21721869]

約数ペア:

[(1, 21721869), (3, 7240623), (9, 2413541), (13, 1670913), (17, 1277757), (39, 556971), (51, 425919), (67, 324207), (117, 185657), (153, 141973), (163, 133263), (201, 108069), (221, 98289), (489, 44421), (603, 36023), (663, 32763), (871, 24939), (1139, 19071), (1467, 14807), (1989, 10921), (2119, 10251), (2613, 8313), (2771, 7839), (3417, 6357)]