21640866

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{101}}^1$

素因数の和:227

約数の個数: 64

約数和(自身を含む): 48940416

約数和(自身を除く): 27299550

約数列:

[1, 2, 3, 6, 13, 26, 39, 41, 67, 78, 82, 101, 123, 134, 201, 202, 246, 303, 402, 533, 606, 871, 1066, 1313, 1599, 1742, 2613, 2626, 2747, 3198, 3939, 4141, 5226, 5494, 6767, 7878, 8241, 8282, 12423, 13534, 16482, 20301, 24846, 35711, 40602, 53833, 71422, 87971, 107133, 107666, 161499, 175942, 214266, 263913, 277447, 322998, 527826, 554894, 832341, 1664682, 3606811, 7213622, 10820433, 21640866]

約数ペア:

[(1, 21640866), (2, 10820433), (3, 7213622), (6, 3606811), (13, 1664682), (26, 832341), (39, 554894), (41, 527826), (67, 322998), (78, 277447), (82, 263913), (101, 214266), (123, 175942), (134, 161499), (201, 107666), (202, 107133), (246, 87971), (303, 71422), (402, 53833), (533, 40602), (606, 35711), (871, 24846), (1066, 20301), (1313, 16482), (1599, 13534), (1742, 12423), (2613, 8282), (2626, 8241), (2747, 7878), (3198, 6767), (3939, 5494), (4141, 5226)]